VPN's are pretty useful. I use one now and a lot more people are starting to. I've seen a lot of these happen over the years, though I'm not sure if it was their ip address that got them swatted. I know a few of them were just careless with their personal information. Like accidently leaking their phone numbers or addresses. Not thinking about the people watching you or that not all of them are good people.
Have also seen a few times where someone live streamed their suicide, while the whole chat was telling them to do it.
If you've ever seen one of Ice Poseidon's streams, he gets in trouble a lot for his fans. Every time he goes somewhere to eat, people find out the restaurant and start calling the restaurant like crazy. It's gotten him kicked out a few times. Or someone watches where he is when he's streaming and then go stalk him.