The chatbox is meant for having fun, but please dont let things get out of hand.
1. No swear spamming
2. No harassing or insulting
3. Please dont be too sexual or crude or whatever. Keep it to a minimum
4. Avoid starting drama
Pretty much all the forum rules apply in the chatbox, although I suppose that spam is more tolerated in the chatbox. Still, there is such thing as too much spam.
Failure to follow these rules may result in you getting kicked as a warning. You also may get yourself banned from the chatbox for a period of time if you keep it up.