bah... the best security is this: replace your airbag with a 12 Gauge Shotgun and wire it to your alarm... if someone starts the car without the key then they will have a point blank problem... cleaning afterwards would be a bitch though.
Back on topic, i think the stakeout would be a good idea, just leave a highly modified line in the parking lot and wait. When the kunts show up we can get a dozen SAU members to totally freak them out and possibly break some legs ...