You're not really helping your own case here. Especially as you're basically using an example of a case whereby having the state not act in the public's interest by addressing the high crime problem, it leads to poor outcomes for the populace; actually justifying the prohibition in the interests of the public's privacy in general over the freedom of private individuals to create a facial recognition based privacy free zone through their own volition and recognizance by leaving contractual acceptance of facial recognition based programs and data sharing open in much the same way as functioning and effective law enforcement prograns are justifiable in maintaining public safety.