So I was thinking even being able to completely remove your own thread but that'd be overkill and grant individuals the ability to remove potential evidence.
But seriously, what's wrong with members being able to close and reopen (one's that they themselves have closed) their own threads..
I don't believe it is such a tedious option to be installed onto the forums as quite a few other MyBB forums have this feature.
It would simply make things more simple for everyone, not having to report the thread to have it closed by a moderator when it could be done with the click of a button yourself...
No need for any redundant posts on your obsolete threads...
Just a suggestion...