[FireBeyond]

> and all you have to do is call in a credible threat

Doesn't even have to be credible. Working as a paramedic, I saw first hand several SWATings that were the furthest thing from credible:

"I'm standing in front of the house and they have a family lined up and kneeling with their hands on their heads and men in balaclavas standing behind them with guns, upstairs" (the house in question is one story). "What color is the house?" "Brown" (it's actually blue). How do you see people kneeling in the middle of a room upstairs from the street - what, do they have the lights on, and all the curtains and blinds open? And that sounds more like "something I saw on a movie once".