When I was getting my electronic degree, one of my teachers had a past problem with an illegal HAM radio operator who kept transmitting way over the legal power limit. The problem was solved with a straight pin, pliers, and flush cutting dikes. You use the pliers to push the straight pin through the illegal transmitter coaxial antenna cable, touching it to BOTH the central conductor and shield. The flush cutting dikes are then used to cut off the pin flush with the plastic sheath, rendering it almost invisible. When the transmitter is keyed up to transmit, the output devices are blown by the ultra low impedance load which is a dead short. Even if they do not blow, no power gets to the transmitter antenna anyway. Problem solved. After blowing his transmitter several times, the illegal HAM operator got the message and began using only legal amounts of power.
