It bothers me. I can see that campers completely play by the rules, but I feel it's overcompetitive. It's like people who refuse to give you credit in Monopoly while taking all they can get for themselves - it's perfectly legitimate, but it's annoying. I'm in it for good clean fun, and that includes not being that guy:
Me: God, come out of your hole, you're annoying me.
That Guy: But it makes me win!
Me: Yeah, but me, I just wanna have fun!
That Guy: Me, too - I'm having fun IF I WIN!
Then again, I have found a way to cope: I make it my primary object not to win, but to make campers and snipers LOSE. Flush them out, snipe them myself, all that stuff, without regard who else I kill. It annoys them to no end, it's just priceless.