I think that scenario was what happened with one of the more recent swattings in the news.
Person A and Person B are getting hot and bothered about something stupid. Person A says "come at me bro, here's my address." Person A gave Person B Person C's address instead.
Person B swatted Person C. Person C had no idea what was going on, went outside, maybe panicked, maybe whatever, but Person C was shot and killed because SWAT had no idea.
I believe A and B were arrested, but usually the cops don't get lucky. They couldn't find the idiot who tried swatting me, but they don't exactly have a ton of resources either.
Shit's scary, especially since it can happen anytime.