Teen behind hundreds of swatting attacks pleads guilty to federal charges

It should really not be possible for a single anonymous phone call to dispatch a heavily armed response team to break down someone's door.

Aside from that, people who do so are despicable. 20 years is a light sentence. Taking money to put people in situations that could easily become deadly.

To be ever so slightly sympathetic to American cops, unlike just about anywhere else in the developed world, it is plausible that the person behind the door is armed with anything up to an automatic rifle, and any random person they stop may be carrying a concealed firearm.

Given that, if I was busting down doors in the US, I’d want to be armed to the teeth, equipped with the best body armour money can buy, and wouldn’t waste a lot of time on niceties until I was sure that nobody was going to attempt to kill me.

Blame the Second Amendment as currently interpreted.

Simple solution: only allow weapons that existed during the creation of the Second Amendment.

That's actually a bad solution. Weapons weren't much less brutal then, mostly just less precise. You'd have people accidentally shooting bystanders in armed conflicts.

We already have that: spray-and-prey is common, as are bystanders killed (even those who are just going about their lives in their own homes). But the weapons of the day were single-shot before reloading. In your argument we would only be reducing the number of bystanders reasonably shot.