I really could care less if people boost. It doesn't affect me. I mean, of course it may lose me a few games and give them an advantage, but I kill them anyway, and I play Call of Duty for fun on a rainy night, now-a-days.
I can understand why it frustrates people though, who play the game competitively. And now that Cage Match is gone, it's going to happen a lot more often now... not a smart move.