Re: Licence to steal is a good way to describe this
then we'll probably see non-police bad actors using these to extract funds from people in the next few years too
Why wait? Guns are easy to get, and it's not that hard to get hold of uniforms as well. Target out-of-state people (handy that the license plates tell you this) and you can hit quite a few people pretending to be cops. There is fundamentally no difference between a pretend cop taking money or a real cop taking money by abusing a loophole - both is theft under duress.
Do this for a few days, then move state and repeat (otherwise it's a bit like stealing from the mafia - the local cops won't like the competition).