Here's a few chatbox rules that are simple to follow.
Disrespecting someone/"burning" someone will result in:
1st offense: Warning
2nd offense: Chat kick
3rd offense: 30 minute chat ban
4th offense: Day length chat ban
5th and final offense: Total chat ban
Other than that, just the simple rules. No posting naughty pictures or huge pics. If you want to post a picture, ask a mod or admin for permission to first.
I don't care if urls are posted either, so long as they are good ones and do not lead the users to a porn site or anything.