I see that alot of people are commenting that "noobs are the ones who complain about *insert weapon/ powerup here*" and though I can understand your view, there are scenarios where you just think, "damn, that was cheap" and I believe that is the crux of this thread. For example, Martyrdom has been mentioned alot and though it can be avoided when you know its there, when I see a blip on the radar and start sneaking up on the target only for some other guy to kill him without my knowing, I walk over a live grenade with too little time to jump my slow ass out of harms reach or throw that bugger away. The result is an untimely death and a frag to some undeserving bastard, that seems cheap to me. The same thing goes for grenade spamming, "Oh so you chose the three grenades perk? I like that one too, but how about you use it to flush out campers, god knows there are enough hiding next to staircases in this game"