I won't let my son play Black Ops either, but I do let him play some violent games. he knows the difference between game world and real world. I would definitely take it away for some time as punishment for sure as well as a few other things but that's just me.
"Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father ... And then will I profess unto them, I never knew you: depart from me, ye that work iniquity."
"If the people let government decide what foods they eat and what medicines they take, their bodies will soon be in as sorry a state as are the souls of those who live under tyranny." - Thomas Jefferson