The New York Times: Internet trolls have learned to exploit our over-militarized police. It's a crime that's hard to stop — and hard to prosecute. One victim was Janet, a junior studying elementary education who had gone home for the weekend in a state of nervous collapse. For months, someone going by the name ‘‘Obnoxious’’ had been harassing her online. He had called her cellphone repeatedly and sent her threatening texts. Worst of all, he had threatened to ‘‘swat’’ her at school — to make a false emergency call to the police and lure a SWAT team to her door. Janet was afraid to go to sleep; she kept thinking that he was going to swat her in the middle of the night. She was right.