I did some aimbot testing today in Ace of Spades and I noticed some odd things:
1.) It is undetectable. The whole time I as testing I wasn't detected at all
2.) I sometimes missed, the aimbot does miss sometimes. Even with the Aimbot its impossible to get 100% accuracy
3.) I wasn't suspected. People didn't even notice I was aimbotting. There could be hundreds of aimbotters out there and we just might not suspect them
4.) The aimbot also has X-Ray plugged in to it. So not only does it aim for you, it can show you an enemy's position
5.) The shotgun and SMG won't reload, so aimbotting with them is impossible as after you fire the first clip, you can't reload again.
6.) Its pretty hard to set up, as once join a game, you have to minimize it (which requires keyboard shortcuts as your mouse is stuck) and then inject the hack.
7.) There is no rapid hack or multiple bullets hack plugged into the aimbot, so those are caused by extreme lag.
So applying this to a game, some telltale signs of an aimbot are:
1.) Has pretty much dead on accuracy with the Rifle
2.) Knows where you are even when you are hiding
And since the 'E' key on the keyboard is used to lock on to a player it an experienced aimbotter could easily hide the fact he is aimbotting and just look exactly like a pro player.