well i dunno what the theft is in boulder. but i park my car on the street, so it is well within view (plus i tend to snag the most high-profile spaces
1) possible insurance discount (i just rememberd, that 6-month $95 security discount must go for both the alarm and the fact that the VIN is laser-etched into all windows).
2) whats the harm in reducing the risk of your car getting stolen? i have no confidence that either the boulder PD or denver PD would be able to recover the car before significant damage is done to it.
3) hell its cool! if a friend wants to take my car for a joyride i can be like "i need to teach you The Way first", and they'd be like "screw ya!" and then they would try to start the car, and would fail, and i would laugh.
... i should set up a digicam in my car that gets activated whenever the ignition sequence is botched and film the focker making an ass out of himself.
that would be cool :P