I don't know which one of these people I like less. The person with this stupid plate. The person who would rat them out on social media. Or the person who would call the fucking cops.
I truly believe that these license plates actually work but not for the reason these idiots think.
As soon as a cop sees your plate, they instantly know you're driving an unregistered vehicle, probably dont have a license, insane, looking for an argument, and impervious to reason. Good chance they're going to say "Fuck it, I'm not dealing with this crap today."
See that's what happens when you go to a country that does not have normalized relations with your sovereign citizen embassy to work out the sovereign citizen agreements and legislation to handle these sort of interactions.
Sovereign Citizens are the absolute most annoying people. You want to deport anyone? Start with them. Keep the migrants & refugees who want to be here. Send the SovCits to SenegalSomalia.