Its like the drug business, its in competition to the legal pharmacy industry. The EA or Activision response might be to make the hacks legal anyway with motion sensors, etc
The best remedy is good admin and regular players. Also if you have 1st person view and they flicking about like the gun is magnetised to peoples heads its kinda obvious.
That would be one of my complaints about the OCUK CS server, it wont let you view the opposite team, a pub server is going to have hacks. Its a massive industry, to some people cheats are how you become a winner lol