I'll also say that i don't think that the attitude in a Paintball is any different to other sports, just that no other sports have such an obvious and substantial payoff for cheating.
And while I personally accept that cheating is a part of the game, i do agree about there being distinct degrees of it. Some I believe acceptable others are just plain extracting urine.
Problem is without decent marshals the honest player has little he can do, which often leads to discarded morals and an escalation of cheating in an attempt to level the playing field.