By the way, what if somebody who wants to play a prank on you steals your phone and sends a porn picture or some hate speech to somebody in the Facebook messeng

By the way, what if somebody who wants to play a prank on you steals your phone and sends a porn picture or some hate speech to somebody in the Facebook messenger? Will this block you from Facebook for life? Will cops arrive and jail you for sexual harassment or whatever? This seems like something quite possible to happen e.g. at school.