These aren't exactly rules, just something you're avised to do.
No punishment will be taken if you break any of these, but still.
1.) Possesion of a mask; This can be needed during some RP situations, to prevent others from finding out your indentity.
2.) Safety in numbers; If you think you're being followed, or something bigs about to go down, don't be afraid to ask for backup.
3.) A shit load of guns; In any gang, it's avised that you're in possession of some guns. This can be done by finding a dealer,
or asking others over /pr. Sometimes, it's mandatory to be in possesion of a weapon, such as points and raids.
4.) Revenge; Don't seek revenge on people who just shot you, it will probably bite you in the ass.
5.) Use common sense.