1: No grammar nazi-ing (unless someone specifically asked for grammar/spelling correction).
2: No critique/negative feedback unless someone asked explicitly.
3: No flip outs over someone using a politically incorrect term, unless it is obvious they are doing it to mean harm. If someone actually posts something very offensive, please email me, don't comment on it.
4: Don't give away personal information, and please let me know if you see anyone doing so, or asking others about personal information.
These things won't necessarily get you banned, but are important!