As a sibling points out, they're using the local lines.
But you don't need anonymous VoIP. You just buy a burner phone with cash. In the US, carriers are required to route emergency calls even if the phone has no SIM card in it, or if you do have a SIM, but your phone can only see a carrier network you don't have permission to use. The idea being emergencies trump silly things like whether or not you've paid your phone bill or picked the "right" carrier for that location. Or if, say, your SIM card got damaged or dislodged in the accident that caused you to need emergency services.
And I think this is a good thing. But it's of course a vector for abuse, too.
I read that interview. They also think it is ridiculous to respond with SWAT to those local line calls. But companies should be liable for those as well. Let's have accountability. Let's make them liable for all calls that they don't fully understand the origin of.
If swatters had to buy burner phones instead of using a free trial on a VOIP service, first of all the price and effort would put this out of range for the typical teenage griefer. Furthermore then the phone call itself would be traceable to a cell tower so people who did a number of these could be tracked down and prosecuted. I think a carrier tracing back to a physical device could fulfill what I am asking for.
Edit: also, similar to how I feel about the payphones comment; let's simply not send a SWAT team out when the caller is nowhere near the area of the reported crime.
But you don't need anonymous VoIP. You just buy a burner phone with cash. In the US, carriers are required to route emergency calls even if the phone has no SIM card in it, or if you do have a SIM, but your phone can only see a carrier network you don't have permission to use. The idea being emergencies trump silly things like whether or not you've paid your phone bill or picked the "right" carrier for that location. Or if, say, your SIM card got damaged or dislodged in the accident that caused you to need emergency services.
And I think this is a good thing. But it's of course a vector for abuse, too.