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Re:Discord Inc. fined 800 000 euros by the CNIL, GDPR regula... by judge2020 on Thursday November 17, 2022 @09:07AM (#33639043)
I think they ended up fixing this, all the deleted users I can find resolve to UID 456226577798135808.

Although, messages that used to @mention the user don't have their UID mangled (since @mentions are really `<@userid>`), so it'd be easy to correlate someone @pinging a deleted user and that deleted user responding to the ping. Seems like fixing this would be pretty challenging (logistically and computationally) given you'd have to arbitrarily edit other peoples' messages.

Re:Discord Inc. fined 800 000 euros by the CNIL, GDPR regula... by anticensor on Sunday November 20, 2022 @11:27AM (#33682288)
Mentions are also listed in the message metadata, in the allowed_mentions field, therefore it should be very easy for Discord to strip mentions of deleted users' IDs.