Swatting is pretty much the shittiest prank a person can pull, if you can even call an action that might lead to someone’s death a “prank.” Somebody calls the police and accuses somebody else—often someone who’s livestreaming—of an in-progress crime so heinous that a SWAT team shows up at their door, with unpredictable consequences. Late last year, a 28-year-old was killed as the result of one.

As police continue to struggle with the issue, the Seattle police department has taken a proactive measure.