I was "egged" by some teens crouching behind a rock wall, in Acton. I thought a rock or some other object had hit my helmet. My husband insisted we go back and check it out, and we saw the remains of the eggs. We rang the bell of the house, but no one answered. The kids were in there, though. We checked inside their mailbox for the name of the family.
I should have called the police, but I didn't. But, about 2 months later, I was at the pharmacy and saw a car with the family's name on their license plate (it's a very unusual name). I left a note on the car, signing my name. About 5 minutes after I got home, I had a phone call from the aunt of these kids; it was her car I saw. She explained the family situation (bad divorce, wild kids) and told me she would take care of it. I received a written apology from the kids.
This is why I live in a small town!