I'm not sure if this has been posted previously, since I don't have the time to look through all 23 pages of this topic, buuuut...
http://www.toplessrobot.com/2011/02/wor ... rs_are.php
Some hilarious examples of terrible role-players and their characters. Here is an example below, one I found quite entertaining:
I wouldn't say it was the worst character, but he was partnered with the worst character ever. We were trying out a brand new game of Cyberpunk 2020, back in the early 90's. The rest of the team consisted of hackers and fixers and netrunners and whatnot - me and this one guy decided to play cops.
Hey, it's cyberpunk. The cops are bribeable, corruptible, shifty and otherwise as dirty as the rest of the team. No problem, and I build my character accordingly.
So we do the tried and true method of "So you all meet in a bar" start of a new campaign that everyone does from time to time. The rest of the team is there, enjoying their drinks, when me and the other cop walk up to the table.
"Everyone here is a wanted criminal?" the other cop player asks the GM.
"Yeah, of course - it's cyberpunk."
"Great! I pull out mu gun and say 'You are all under arrest!'"
Stunned silence in the entire room. I'm all like "Wait, no! I'm not with this guy!" as everyone in the party pulls their rather large scale weapons and opens fire, gunning us both down.
The rest of the night degenerated into an argument with The Good Cop how that was totally in character and how his character should still be alive since he had a helmet on.
Total campaign set up time: about 3 hours. Total campaign play time: 30 seconds.
Some of them aren't quite PG-13, just fyi.