Headlamps kicked in - car alarm advice?

[tymill]

Right, I don't like whinging - but I'm getting annoyed at kids in the area taking great fun in kicking in the headlamps on my car. Again. and Again.

I've a very good idea as to what group of kids it might be as the last time they were seen by a neighbour pulling my car's doors off, they were able to give a vague description - but nothing useful.

I really just want to honeypot/stakeout after school one day and catch them, but it's tough.

I'm wondering if there's some sort of cheap way to rig up a motion-detection cam in the car? I'd love to see a great mug of the kid kicking away at my headlamps so I can move on that.

Would an ordinary "whoo whoo" car alarm be helpful? perhaps.

Are they dear? do you get what you pay for? Can I make one up for peanuts as an electronics project? Hmm.

yeah, the car's quite distinctive - see my profile - but this is just getting annoying.

I just keep repairing it - never surrender. Last thing I want is to have them see me get all annoyed, as that's victory for them.