Easy enough to find. The virtues of the system are touted as having a need to provide accurate information to 911.
So theoretically, you could use your Librem 5 with the GPS turned off (kill switch for GPS not even needed) to call the police or 911, tell them this is a prank call, tell them to f-off, and dare them to try to catch you if they can. Then you could hang up, consequence free. According to the article, this capability is what the FCC is trying to prevent. Just make sure your number and SIM information are hidden too.
I see need or desire to use a Librem 5 for nefarious purposes. But if you want to maintain legal compliance, it’s a violation of law right now (apparently), just to turn your GPS off, ever. Most manufacturers just do everything the law requires. Will Purism ever be told by the government that they have to prevent the GPS on the phone being turned off by the phone owners? All the FCC has to do is just revoke the FCC certification if Purism refuses to comply.