I think we need...

What? If it were me, I'd ban them altogether.

On a related note, they tend to cause more miscommunication that anything. Someone will reply to a thread in a sarcastic manner and put a smiley to note they are just kidding. That will be followed by the original poster getting huffy cause the person "told them off". The sarcastic one will reply with "Look at my smiley moron. I was kidding". From there its anyone's game.

Smilies suck :)