- User registered and posted several messages.
- I moved some messages from one topic to a new one (offtopic/discussion).
- Message from the user from #1 was the first one, so he’s a “topic starter”. People discuss things in this new topic, 80+ messages.
- After several days, the user deletes his account. He can do that if the account is registered recently.
- The topic is deleted.
This is a real situation. I’ve found this topic because initially I thought the user has just deleted his own topic, but no — he just deleted the account, and that resulted in topic deletion. Discourse wipes all the account data (incl. all posts) upon deletion automatically — I see “topic deleted”, then “account deleted” in the logs.