If its not any part of the reason for the arrest, why mention it?
Oh yeah, add a little humiliation for the kid while you're at it.
In my high school if we were turning people computers off the teacher would A) laugh B) give you an F for the day/project C) send you to the office where you would probably be suspended.
C) being as far as this should have gone. Send him to the office, let them deal with him first. If problems persist, contact the parents, if that doesn't do anything, maybe CPS or something along those lines, but arresting a kid for something like this is like you or me getting arrested for being on SM while at work.