Oddbean new post about login | logout I put suggestions in my closing remarks of this essay years ago. There are several red flags that can be used to stop swatters. https://blog.lopp.net/reflections-upon-a-swatting/
These suggestions are nobrainers and I would be shocked, if at least some of them are not already implemented. Swatting did become more common since your case, so every emergency line operator should be more suspicious by now. But what am I thinking, we are talking about government after all.