It's strange that you mention that, my friend was playing yesterday and two of his stinger missiles missed the cobra. Later that day though, everything was fine and it never happened again. I never thought people could hack any of the killstreaks, if that's the case they could do other things like extended air time, and infinite flares.

my brother actually go into a hacked lobby in KC if you pick the tags you get like tons of points. there was this level 16 prestige 1 guy that got to level 80 in one game. I notice that my brother went to place 900s in the leaderboard, when before the match he was on 72000s

The hackers are going to find a way to exploit these games as long as the developers keep allowing it with lax security measures and/or former or current employees possibly "leaking" codes and such. Hackers hack because they can and low life cheaters follow along. Thats just my opinion and you don't have to agree with it.

I've seen some "anomalies" over the last 5 years, some were easily indentifed as cheats, alot were contributed to what most people call lag. May not be in this case but with all the leaderboard cheats poping up the last several weeks, it wouldn't surprise me.

You can say what you want, but no one can convince me that PSN isn't throttling back our internet connection to this game. Networks like PSN, XBOX , PC... along with all internet service providersjust  can't handle millions of people, all at once (just on video games) with either crappy, mediocre or great internet and have everyone synced perfectly.