Swatting→

Daily Dot:

Sending police to unsuspecting victim’s houses, typically in the middle of the night, is called swatting—and it’s an increasingly common technique employed to terrorize. It gained prominence with livestreaming gamers, as attackers would cackle with schadenfreude watching cops busting in on enemies mid-session. What makes swatting such a powerful tactic is the obligation police have to take every call seriously.

I’m fairly certain that making a fraudulent call like that is illegal, but it’s hard to enforce that sort of thing against people who can be anonymizing themselves from half a world away.