Last time there were avatars, someone hacked the forum by uploading javascript to the avatar. This happened:
Also, there was a meter saying that your bitcoins were going to be transferred to "CosbyCoins" (I wasn't here when the forum got hacked, but I have read about it.)
There should be avatar uploads in the new forum software, going to be released around February.
Video:
https://www.youtube.com/watch?v=LKrOHAfMdxI&hd=1Sorry to necro this thread, but this is the funniest thing I have seen in a long time. Bravo for finding the exploit, coding up that masterpiece, and not trying to screw the community. Golden stars all around. Beautiful.