The same thing happened to my son when he was in college in Boston. He came out one morning only to find his window smashed with his stereo ripped out of the dashboard and a couple dollars worth of change in the middle compartment of his seats missing. They really ripped the h... out of the dashbord.
The following year he came out to find his newer car totaled by a hit and run. The hit his car so hard that it was smashed like an accordian as it was pushed into the car ahead of him.
I don't think this is all that uncommon, however I don't understand how someone can do this and just walk off!
I thank God in both cases that my son wasn't in the car as who knows what could have happened!
Just remember material things can be replaced! Glad no one was hurt or worse!