Only two rules, hopefully these are enough.
Treat people with respect, which means not making statements that are racist, sexist, etc. (I realize that "etc" is compressing a lot, we'll see if more needs to be listed.) Basically, statements that could make people feel targeted for who they are.
No one ever thinks the things they say could violate rule 1, which is why the chat has mods. If the mods determine that something you said violated rule 1, please don't argue the decision. Be aware that throughout the history of the Internet, the main reason that anyone ever gets banned is because they want to argue with the mods about a decision. Please realize that arguing with the mods will likely lead to a ban, and honestly, what other outcome did you expect? Come on now.