This was the reason I was banned once (and why I'm now Pompmaker2):
I used to abuse bot events to crash servers (I don't do it anymore) while spreading the Fungusamongus name around. I would event it such that when the bot killed people, they would first be given a death message by Fungusamongus. I remember it caused a lot of uproar and inspired the creation of several add-ons and threads.
I even got a server to worship Fungus and do his bidding at one point. Sadly, I don't have any screenshots because I cleared my screenshot folder.
It was all in the name of fun, though I stopped it now.
Oops, sorry, was that a little bit too serious for this thread?
I once bragged about having the Ion cannon.