it needs to be illegal for the government to buy data or intelligence that it could not otherwise legally collect itself.
Why do you think the government couldn’t collect this information themselves? ALPRs are legal, cameras covering a public roadway are legal, and the 4th amendment doesn’t extend to driving on a public roadway.
This wouldn't even help anyway. Flock sells to law enforcement, sure, but they also sell data to everyone else who wants to know everything about everyone.
Thats a perfect statement to close the loophole.
It obvious this should be the case, but when you dump billions of dollars getting around 4th amendment protections, lets just say it takes awhile to close the loopholes.