Lol. that's 1 bad hack.
Too be honest i play cod a lot and i have never seen this particular hack but i know these things do happen on call of duty, i guess as long as it's rare cases then it's sort of ok as long as you don't bump into this stuff once a night i'm happy.
I think or would assume people who do these hacks would only play a few games a week with the hack, because lets face it you would get bored playing if you was invincible all the time, but the most frequent hack i have seen in Bo2 on ps3 is when they pull out a death machine,war machine,dragon fire etc within a few seconds of game starting generally on s&d but that's all i can think of hack wise i have seen,oh and the changing gun camo and a few hacked gamer titles that are not in even in the game to unlock.
I don't think this hacking will stop especially on cod ghosts or any next gen console game for that matter which is a shame, but i am for one not buying ghost early if at all because we all know Activision's cod games get hacked the worse and quickest, at least Treyarch get hacked after like 6-8 months after release but after that they don't care they have our money.