I've made a few major blunders, I'm using an example on another server form.
Pretty much the thread had turned into everyone saying OP is wrong, several times and it would keep getting bumped. Eventually the OP figured he could delete the thread and the five pages of the same thing stopped.
It would also be great if I had the option to delete duplicate posts, as apparently there can be major consequences or something from doing that accidentally. Say I make that mistake right before I have to go off and do someting and I come back to it three days later to discover it.