We might have done dumb things when we're younger. By the fact that he can travel around probably the charges are minimal but still shows up in his record. Even tresspassing a yard will get you a criminal record if the property owner decides to follow through.
I was held for two hours with a return tix just for a short visit lmao. The senior on the interogation area looked at my passport and return ticket and asked two questions and she just straight up. "Yeah I dont know why you got sent here".