Run a tube from your windshield wiper reservoir to the bottom of each door, tap the wires for the wiper fluid motor into the car alarm, also set up an igniter at the end of the tube and wire it so the motor starts to pump and the igniter engages when the alarm goes off, then fill the reservoir with something like lighter fluid. So when one of those punks tries to get in it sets they're *** on fire. OH! you might want like a back flow valve or something so the flame doesn’t travel back to the reservoir.
Ok so that was a bad idea but anyway, sorry you got your deck stolen. I do not really have anything productive to contribute.