In T326929#9740445, @Tchanders wrote:

Note this comment from @Dreamy_Jazz which is relevant here: T337090#9683710.

That task was about disallowing certain numbers, and the chosen solution was to start from a higher number than the disallowed numbers. @Niharika gave the go-ahead on this, and confirmed that longer numbers that contain those disallowed numbers as substrings will be allowed. (Unfortunately that doesn't seem to be documented on the task, but that discussion would have happened later than this comment: T326929#9657849)

Note this comment from @Dreamy_Jazz which is relevant here: T337090#9683710.

I have removed the Campaigns team tag, since AHT will be taking on this work (so they can decide what to do with this investigation ticket & next steps).

Summary of a discussion with @Niharika:

• TitleBlacklist hits for temp account creation don't need to be logged, since it's a system failure and not an action by a person. If it's much easier to log, the log could be attributed to a system user (e.g. TempAccountCreator). If we could silently re-attempt the creation, that would be ideal.
• Could we use the TitleBlacklist to solve T337090?
• Do we need to remove this from https://meta.wikimedia.org/w/index.php?title=Title_blacklist (it shouldn't be necessary once we have done T349506:

Prevent usernames similar to temporary accounts (phab:T345678)
^~\d{4}[\d-]+ <newaccountonly>

In T326929#9618940, @kostajh wrote:

In T326929#9243280, @Daimona wrote:

Personally, I don't think the TB should be bypassed. If any regexp is preventing the creation of temp accounts, that will appear immediately in the TB hit log, and admins can update the TB accordingly.

That sounds reasonable to me. (cc @Tchanders)

In T326929#9618940, @kostajh wrote:

In T326929#9243280, @Daimona wrote:

Personally, I don't think the TB should be bypassed. If any regexp is preventing the creation of temp accounts, that will appear immediately in the TB hit log, and admins can update the TB accordingly.

That sounds reasonable to me. (cc @Tchanders)

In T326929#9634196, @ifried wrote:

Thanks for your feedback, @kostajh! Would @Tchanders be responsible for making the final decision?

Thanks for your feedback, @kostajh! Would @Tchanders be responsible for making the final decision?

In T326929#9243280, @Daimona wrote:

Personally, I don't think the TB should be bypassed. If any regexp is preventing the creation of temp accounts, that will appear immediately in the TB hit log, and admins can update the TB accordingly.

Hello, @Tchanders & @Niharika! I'm wondering who would be the best person to respond to the product question brought up in the above comment as a result of the investigation. Thanks in advance!

Hello, @Niharika! It looks like a product question came out of this investigation, so I am pinging you here to see what product input you may have. Thanks!

Change 990156 merged by jenkins-bot:

[mediawiki/extensions/ConfirmEdit@master] */extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990156

Change 990097 merged by jenkins-bot:

[mediawiki/extensions/ORES@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990097

Change 990095 merged by jenkins-bot:

[mediawiki/extensions/NavigationTiming@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990095

Change 990108 merged by jenkins-bot:

[mediawiki/extensions/WebAuthn@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990108

Change 990159 merged by jenkins-bot:

[mediawiki/extensions/DismissableSiteNotice@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990159

Change 990159 had a related patch set uploaded (by Jforrester; author: Jforrester):

[mediawiki/extensions/DismissableSiteNotice@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990159

Change 990156 had a related patch set uploaded (by Jforrester; author: Jforrester):

[mediawiki/extensions/ConfirmEdit@master] */extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990156

Change 990087 merged by jenkins-bot:

[mediawiki/extensions/DiscussionTools@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990087

Change 990086 merged by jenkins-bot:

[mediawiki/extensions/CodeEditor@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990086

Change 990094 merged by jenkins-bot:

[mediawiki/extensions/MediaSearch@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990094

Change 990093 merged by jenkins-bot:

[mediawiki/extensions/MachineVision@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990093

Change 990109 merged by jenkins-bot:

[mediawiki/extensions/WikibaseMediaInfo@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990109

Change 990089 merged by jenkins-bot:

[mediawiki/extensions/GlobalWatchlist@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990089

Change 990057 merged by jenkins-bot:

[mediawiki/extensions/AbuseFilter@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990057

Change 990065 merged by jenkins-bot:

[mediawiki/extensions/CharInsert@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990065

Change 990115 merged by jenkins-bot:

[mediawiki/extensions/timeline@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990115

Change 990107 merged by jenkins-bot:

[mediawiki/extensions/VueTest@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990107

Change 990116 merged by jenkins-bot:

[mediawiki/extensions/wikihiero@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990116

Change 990099 merged by jenkins-bot:

[mediawiki/extensions/Score@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990099

Change 990063 merged by jenkins-bot:

[mediawiki/extensions/CentralAuth@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990063

Change 990088 merged by jenkins-bot:

[mediawiki/extensions/FlaggedRevs@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990088

Change 990058 merged by jenkins-bot:

[mediawiki/extensions/ArticlePlaceholder@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990058

Change 990101 merged by jenkins-bot:

[mediawiki/extensions/SyntaxHighlight_GeSHi@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990101

Change 990104 merged by jenkins-bot:

[mediawiki/extensions/UploadWizard@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990104

Change 990106 merged by jenkins-bot:

[mediawiki/extensions/WikiEditor@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990106

Change 990112 merged by jenkins-bot:

[mediawiki/extensions/WikimediaBadges@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990112

Change 990111 merged by jenkins-bot:

[mediawiki/extensions/Wikidata.org@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990111

Change 990105 merged by jenkins-bot:

[mediawiki/extensions/VisualEditor@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990105

Change 990098 merged by jenkins-bot:

[mediawiki/extensions/Quiz@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990098

Change 990103 merged by jenkins-bot:

[mediawiki/extensions/TitleBlacklist@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990103

Change 990059 merged by jenkins-bot:

[mediawiki/extensions/BetaFeatures@master] extension.json: Drop RL targets definitions, no longer honoured

https://gerrit.wikimedia.org/r/990059