My co-worker's 14 yr old son accidentally left a pocket knife in his jeans (left over from a weekend camping trip) and he wore those same jeans to school. He felt the bulge in his pocket and said, Whoops! That's my pocket knife! And several girls ran to the teacher and said, that boy has a knife in class!
The teacher called security, they called police, the parents had to pick up the kid at the police station, and the kid was charged, sentenced to probation, and had to perform 200 hours of car washing of police cars.