Its a simple trick i used today to stop 3 hackers in abusing at spawn. It is by using the extra command given to trusted players. First thing is identify who the hackers are and identify their hacks. Secondly, change your selection to police using /class. Third, use **god to be invulnerable to their hacks. and lastly, /cuff them and they can't do anything that may harm other players. They can just airbreak or run fast but they cant kill other players.
Here some pictures: