Okay, so i don't give a hoot about why people cheat, who's responsible for fixing it, how much it costs, whether it will ever be profitable to fix them, etc... A simple, useful question was asked earlier but I didn't see a clear answer between all the bickering....
How did you detect the aimbot cheat on your server? This would be the most useful information toward finding a fix or anti-cheat.
Don't worry about making the world cheat-free. Let's address it one cheat at a time.