if you see your getting owned by a particular person over and over and over, and then if their score doesnt reflect a "normal" score. then you should be suspicious. Some players are just that good, but others......nay. And when you spectate aimbot, its pretty easy to tell. and if they are using a see-all hack, its even more obvious. go to youtube.com and search for Call of duty 4 aimbot. and you can see what the hackers see.