Same thing happened to us on Sat night. Well simular. Drunken kids.
My sisters Celica was parked out the front, and at about 12:30 we hear this banging. My father went out, and saw these kids running off. They kicked in the front right guard in about 3 places, it's totally mangled. They kicked in the rear right 1/4 panel. In the morning in the light I noticed foot prints up and down the car. They jumped onto the bonnet (thankfully that is still ok), over the windscreen, 2 big dints in the roof, 1 big dint in the tail gate.
Just after it happened, I jumped in the Falcon (white, in the dark would look like a cop car) and started looking for the wankers. Some time later, I drove past a group of about 1/2 a dozen. I passed them slowly and they were looking at me, I did a U turn, chucked the high beams on and floored it. They fled like the pussies they were. They hid. About 2 mins later, I was still driving around and was heading past a school. I saw em again, I put the high beams on and floored it again, they fled again.
I wasn't going to do anything like get out and "bust a cap in their ass" as you can't prove a thing, as we didn't see them banging the car up... but atleast I scared them and they might think twice about doing it again.
