Tamsie
: Swatting started with online gamers getting real life revenge for an opponent beating their best times or high scores. Police think it's a real violent situation and send in SWAT Teams on innocent people who think intruders are breaking in. More than once, innocent homeowners were injured.
The people making the anonymous calls to police don't care who gets hurt and think the police can't trace the call to them. Sometimes they can and sometimes they can't.