I had a few duels with Jastak1 today, the first time it appeared he was using aimbot. After I called him out on it, others agreed. It seems the community as a whole agrees with this theory. After the first duel, his playing style completely changed in the next duel and he was shit. I believe he selectively enables it which is why this has been occurring for so long without administrative action.
Possibly the best driver on SA-MP?