This thread reminds me of something that I did many years ago.
Short version of incident..
One night a pikey tried to take my pickup truck from our driveway. I caught him, and it ended up with me giving chase, and being run down by his car as he tried to escape.
Police were called, and traced the car back to a camp in Dartford, some 40 odd miles away. He had kindly left the front bumper and number plate behind in his haste to escape from me.
When I woke in the morning, he or they had come back and stripped the lights from the truck.
My solution was take a load of those French pull by string firework bangers, wrap them in layer upon layer of electrical insulation tape to increase the effect of them, swap the string for wire, and then attach them to every light on the truck, from behind the light unit. The bastids never came back, so I never got to find out just how effective that they might have been.