It's all a question of whether the police should be 'anglers' (rod and reel, trolling for individual law-breakers) or whether they should longliners, raking in everybody, and accepting the collateral damages. Anonymity IS important, but police use of 'facial profiling' basically removes any anonymity you have AND introduces a real possibility of error. Unless, of course, you move to the next logical step, and tattoo (via UV sensitive ink, perhaps, for the 'beautiful people'?) SS numbers onto the foreheads of citizens and green-card holders?

When DOES action essentially for the convenience of the police 'cross the line', anyway?