Somehow people just need to realize that they can edit. On my long term pages, such as art contests, etc, I post as one of the rules that if they mess up and stretch the page or something that they should edit it to a better size. This usually helps a little on limiting these posts, but some people do it regardless.
I like it when people do this:
This is an excellent idea.
EDIT: Oh, I just thought of a great name for it too. We could call it a warza!
Only...well, the post would have more of a point, but you get the idea.