Im wondering, if we should get some kind of rules, since it seems that we dont have any

Since i played a cw recently, where it went long, long long, then over 3 mins and i thought that everyone "knew" that it should be a rule with rtl 3, but then i heard that in some servers its 2, that is 1 point why i want somekind of steady rules that we all can follow. And if the time goes past 20 min the one who got rcon turn the rtl off etc.. u get my point?.
Same thing is with dmflags, ok 768 (or if its 786:P) and the finnish

And same thing for grenades, so u cant have 4, so we say that the standard is max tgren 2.
I can come up to many things about this, just want to know what the rest is thinking.
Offtopic: sorry for the spelling etc, im damn tired:)