1- Aka people using the games weapons how they are supposed to be used and utilizing maps for positions that let them get kills.2- Sure, now there is, but back then, they were only then sprouting out in xbox around may-june noticeably for Xbox, but none of PS3. This was easily avoidable, but now, yes, there are a lot of hackers. No one really cares about the game anymore though, so what do you expect?3- AKA free killsAlso, they added grenades for a reason. Unlike 80% of other games where grenades do jack-squat, you actually have to be aware with explosions all around and what-not.