I was thinking mainly of the issue of proof in court. Of course the police would deny that anybody was being put at risk by their attack, and a defence counsel would use this. As a result you would not get a conviction for reckless endangerment or anything like that.
But make wasting police time a serious federal offence with appropriate penalties and the burden of proof is much lower.
The thing about swatting is that the callers uniformly portray a situation with an armed person who has/is supposedly going to kill someone - it’s very deliberately being set up to create the most tension and highest probability of violence possible. An honest police officer would admit that being sent to a home with the expectation of meeting an armed killer could result in someone getting shot - if only the police themselves. (Ok, granted, that requires an honest police officer.) Still - it regularly happens that SWAT teams go to the wrong address and the inhabitants and/or police get killed, and I think people are more aware of that these days, and in that context the caller’s intention is pretty clear - this is intended to be more than just an inconvenience.
This is where specific anti-swatting legislation becomes useful - you need only be concerned about whether they were the ones that made the call that fit the criteria for swatting, with the possibility for harm assumed.
If famous people do nothing else for the rest of us, they suffer common problems publicly and visibly