i wonder how the olympics would turn out with this mindset 
no offence at all. but what you descripe is not "a game" but merely some kind of timewaste like watching a movie or some solitaire. a game have rules. if no rules, it wouldnt be a game. if you dont follow the rules, you aint playing the game. in crpg, the point is basicly to kill the enemy team, resulting in a win >> multiplier. cut to the chase: if you dont kill the enemy (for whatever reason) you fail. just imvho
its like playing say a game of chess and then lose on purpose cus opponent is a friend... come on bleh. you are actually shooting yourself and him in the foot; neither of you wont become better at chess. and at the end of the day, becomming better is the entire point isnt it?
I would like to agree to the general thought, but:
the rules off chess are what makes the world of the game. so the chessboard and it's figures roles and moving rules are the equivalent of the cRPG world, weapons, avatars, animations and stuff, NOT the admin rules.
whether or not you decide to warn the opponent of one of his fatal moves in chess, or decide to not gank a buddy you know wouldn't exactly like that, is a matter of fair play, and not the games rule, in my book.
f.i., when I play against less experienced players, I tend to level out some differences (like putting away my shield against another 1handed user), because otherwise it's just no challenge to me. gaming, and playful behavior in general, has a lot to do with handicap to make it equal. I am not saying that this is the law, but it's an observation you can make, anywhere. even in the animal kingdom.
winning and "getting better" is
not everything, for me at least. I want to have fun too, and I'm not the only one. actually, it's making me feel alive, more than being on the top of some list.
I should have added to the above post:
I am not one to defend a so-called "bro", but I would think twice about attacking him; that is unless he is attacking me, or my team needs the help (given he is one of the last of his team).
on the one hand it's really more complicated than what the "rules" say, because they just can't make the kid in us go away; and on the other hand, for me personally, it's really simple: I want to have fun, and I can empathize with other players too.
btw., have you seen PEPEs videos of him and his kids? there you go: handicap, to have mutual fun. there is no getting better for PEPE, not even winning, but something way more important. to be a little cheesy here
