The user "SuperTroll" has recently been vandalizing their own questions, see their user page for many examples: https://math.stackexchange.com/users/94756/supertroll
It does not appear SuperTroll has been giving any good reason for this vandalism. Given the possibility they are trying to cover their tracks, perhaps we should revert the edits?
I imagine there's some discussion on this topic already but my brief search did not discover any.