I'm sure others have said something to this effect: the SWAT team has to go in heavily armed in preparation for the worst of situations. That's what they're trained to deal with. There's no way, a priori, for them to be able to know if a situation is real or falsified, and it is extremely difficult to ascertain the nature of a situation behind closed doors, shuttered windows, and walls. So, they simply have to be prepared for the worst.
Now, having said that, I do feel that the real way of stopping this kind of thing is to turn the consequences back on the perpetrator of the false report. Basically, the authorities need to be able to trace, track, and identify the person calling in the SWAT. What I'm saying is there needs to be direct and immediate consequences for falsified reporting. This is not a game. Unfortunately, the people who do this likely don't have the maturity to understand that and don't have the maturity to figure out that their actions are hurting others. They only care about doing what they want, when they want, to whomever they want, however they want, and no one better say shit against it. They're completely insular, self-absorbed, ego-centric, and childish. They're sociopaths, and no amount of logic or convincing will turn their minds. Nothing short of turning the pain right back at them will make them see that people don't appreciate this kind of thing. And even then, I doubt they'll see it as more than "nobody ever let's me have any fun...boo hoo!"; in other words, they won't learn a damn thing. They'll just get mad back at you for not letting them do what they want to do. They'll never understand, nor care about, the pain and suffering they cause others.
I know that may sound harsh, but, in my opinion, it takes a truly deviant and disturbed mind (or one that simply was never taught better) to honestly think that creating a situation in which a person and his/her family is put in severe danger and subjected to intense emotional trauma is fun and entertaining. They would not think it fun if it happened to them, but they do think it fun if it happens to others. The only possibility I could ever see to lighten my disgust at someone doing this would be to learn that they really are just that stupid and didn't know any better; that their parents really failed so spectacularly to instill within them an ability to think how one's actions can and do affect others. However, while that would lighten my disgust, it would not lighten my opinion that these people need to be severely punished for their actions. A child needs to have it made known to them, swiftly, decisively, and unambiguously, that their bad behavior is wrong and will not be tolerated, and that it is not a point open for negotiation or entreatment.
Here's one thing I always think about whenever I'm on the Internet, and I'll admit, I, like many, had my troll days, too. However, one must always keep in mind that there is another human being on the other side of that screen, and your words, for good or ill, has a direct affect on that person. The rules of human social interaction and etiquette still apply, 100%, even when on online. If the behavior you have online is not the kind of behavior you would have in real life toward another person directly in front of you, then you need to seriously consider changing your behavior online to be more like your behavior in real life. Emotions are real, even online. The hurt is real, even online.
I would bet that many of the trolls online are some of the nicest, most mousy type personalities you could ever meet, because they are terrified of getting the shit kicked out of them for pissing someone else off. And that's part of the problem is that there is no direct danger of consequences (or severe enough consequences) for bad behavior online. So, these people unleash their frustrations online and lash out at others. But again, if you are able to figure out that engaging bad behavior in real life would cause people to become pissed at you, why, then, is it such a stretch to think the same about being online? Sure, you might not get beat-up for it, but you still pissed someone off. If you cared about it in real life, you should care about it online, in my opinion, precisely for the reason that, online, you are still interacting with actual, living human beings. The words you see onscreen are not just random generated text from an unfeeling computer. Another person typed those words. Another person is attempting to express their thoughts and feelings in those words. Their words have an effect on you, and your words have an effect on them. If you wouldn't say it or do it in real life to the person's face, don't say it or do it online.
Apologies for the sudden rant. I won't say my opinion here is the best or most correct, but this sort of thing is really disgusting. And for those people trying to pass it off as not an issue for the gaming community, honestly, stop trying to hide in the fantasy ideal that your beloved gaming world is a pristine utopia of perfect existence. The gaming community has some serious sociopathic and general behavioral issues. As far as I know, this sort of thing doesn't seem to happen in any other circle. We, as gamers, need to be willing to face the fact that the community contains some severely sociopathic, reprehensible, and deviant elements, and we need to be the ones to take charge to clean-up our community such to eliminate these elements (or at least reduce them to the point that the behaviors we have seen are not so prevalent as they are). We need to be the ones to make it clear that bad behavior of this sort will not be tolerated within our community. If that gets us labelled as SJWs or whatever else, then so be it. However, we as a community must choose which is more important to us, a community of like-minded individuals who seek to create a safe, comfortable environment for fun interaction and socialization with others with gaming as a platform, or avoiding being called names that have long since lost any real meaning cause they're over-abused to only mean "you disagree with me and won't let me just do what I want".