On Drupal Answers, while taking care of some comment flags, I noticed that a comment written on March, 2012 is reported to be deleted by a single user today.
- The user who seems to have deleted the comment is not the user who asked the question
- The user who is reported to have deleted the comment is not a moderator
- The user who wrote the comment is now a moderator, but it was not at the time when the comment was written
How is it possible that a single user can delete a comment left by somebody else?
The comments that result deleted from a single user are two. This is what they contained. (I report the part that is relevant as for the "comments about accept rate are deleted after a single user flags them.")
It'd be good to accept the answers to your previous questions, you currently have a 0% accept rate […].
Thanks for that it's much appreciated by the community...I don't think you've actually accepted the answer though! You've voted 3 of them up, which is great, but accepting works slightly differently. There's a little outline of a tick to the left of each of the answers...If you click that it'll turn green and you will have accepted the answer as the correct one. […]
From the page listing all the flags, I get the following.
There are two comment flags for obsolete comments that result handled by the Community user. (Truly, the Community user is reported to be the deletion user.) The "6 hours ago" reported for the "Comment Deleted" line and the "comment flag: obsolete" line match perfectly. (That is, the timestamp is "2013-09-10 06:08:01Z" for both the lines.)