The bigger problem is law enforcement's use of private business as end-around to dodge 4th amendment.
Google and Apple, Verizon and AT&T, auto manufacturers, Flock, and every other business that scoops up our data has a trove of information that would be unquestionably illegal for law enforcement to collect directly due to 4th amendment protections against government mass surveillance. So, instead, the businesses conduct the mass surveillance and then law enforcement gets to access that information -- either with a warrant as is the case for Google and Apple, or with some sort agreement as with Flock.
Businesses (or individuals) that deliver surveillance data to the government, compelled by warrant or otherwise, should be subject to the same constitutional restrictions as the government itself.
Is it common for normal people to set up and use ALPRs?
Non-investigating would be tasks like:
- counting the number of vehicles going by - radar’ing every car to produce a report on how many people are speeding and how much - checking all licence plates for valid registrations to produce a report on what percentage of cars have expired tags on the road.