I can't believe no one has mentioned cornering the bowl. That is one of the more important ones for me, nothing pisses me off more than someone burning the whole top of a bowl of some good shit. Other than that, if you roll it you spark it, though the rotation doesn't really matter from there, left or right as long doesn't matter just don't mess it up. That's about it, lipping the bowl and mooching aren't really a problem for me, except for a couple people, and they are dealt with accordingly. No one I smoke with is stupid enough to cough back into the piece, we'd all be pretty appalled to see that happen.

Oh wait one thing does piss me off more than not cornering a bowl. If you call me to find you weed b/c you can't find any, I find the weed, cover the money for you and buy it, and drive to meet you, you GODDAMN WELL better be packing one up. Fail this one, and don't expect me to hook you up again.