I've had this idea for a long time... Ever been frustrated by rude, obnoxious, inattentive, or just plain scary people on the road? To the point you actually wish there was a cop nearby messing with the flow of traffic, just to stop this driver, and save the rest of us? I have the solution! Everyone should be armed with a paintball gun that's filled with paint that disappears as it dries. It would not harm the paint and would not leave a trace after 24hrs. It would be able to withstand...