It must have been young kids because I can't see someone in their twenties doing some childish shit like that. Kids these days are totally fucked up in the head. My wife recorded some 8 yr. old kids last year throwing glass bottles at my back-up car. I went over their house to speak to their father and he gave me the dumbest look like if I was bothering him. Back in the day we did pranks but throwing eggs was all we did. A giant rock through the back window is way too extreme.