Maybe just sending out a single squad car first to get a credible assessment?
I'd challenge that view by claiming that if the threat is of someone holding their family hostage threatening to kill them (just a guess at what these "swatters" might say to the dispatcher to get cops to actually kick in some doors, I don't know what their state-of-the-art accusation is), then sending one cop car, poorly equipped, sounds a bit silly for multiple reasons.