Prohibit law enforcement from using UAVs (Unmanned Autonomous Vehicles), armed vehicles. Also, restrict the use of remote vehicles to already open investigations.
The use of UAVs and armed vehicles by law enforcement will only serve to create a police state as there are currently no restriction on their use. Nobody wants predator drones in our skies with lethal capabilities or drones following their every move. While predator drones are the extreme, there are already local law enforcement that have begun using small remote aerial vehicles that are designed to have armaments attached. It is not unforeseeable that one of these be armed or UAVs be watching for a "potential crime".
UAVs shouldn't be outlawed completely as they have many educational and commercial applications.