Maybe its because people know that this is the only way to get their attention? Look at the male bunny suit or egi glamour. Would we have gotten those if we did not ask them about it again and again? Also they are the ones picking the questions. There is no harm in asking as long as its not rude..and if they choose to pick that one and then act annoyed..well they only have themselves to blame.
About your point a few pages back with neutral topics: Why should people need to post something neutral as topic itself? Maybe they just dont like it and want to write why? And sometimes they want to have the opinion of others too but I honestly dont see what a neutral title itself would do. The discussion inside it would be mixed anyways. (Look at this one..its a support thread..something positive..and yet more than enough people just come here to post useless off topic insults)