Oh for crying out loud, there was absolutely nothing wrong with Second Chance. It took me all of 10 minutes to figure out how to counter it, and I'd never played any Call of Duty multiplayer before (I played #3 on Wii before in campaign, that's it). It's fucking simple:
1. Did you get full kill points when he's going down? No? Keep shooting then, because he has Second Chance.
2. If someone does kill you with Second Chance, you pay attention to what their name is, and next time you kill them, you keep shooting until they die so they don't get killed again.
People who can't handle others using Second Chance are the true noobs of Black Ops, not the ones using it. It's actually a pretty piss-poor perk to take since it's so easy to counter. There are far more beneficial perks out there to use in that perk slot, so I don't know why people bothered using it in the first place. Treyarch should apologize, not for the perk being cheap, but for the perk being shit. It needed a buff to make it useful, but I guess cutting it entirely to make room for better perks is fine too.
But really, saying that Second Chance is cheap is basically a neon sign saying "I SUCK AT BLACK OPS!" or "I'M TOO SLOW TO PICK UP ON THE BLATANTLY OBVIOUS WAYS TO TELL SOMEONE IS USING THIS PERK AND ALSO MY MOM AND DAD STILL WIPE MY ASS FOR ME BECAUSE I'M TOO SLOW TO DO THAT FOR MYSELF AS WELL!"