If you were an employer, or in a business that attracted people selling stolen goods, you would find these resources very handy. There's a big industry of "records searchers" for that reason--some are legit and some are scams. If you really needed to discretely find out someone's whereabouts, and not put your own name in a request, there are private eyes to do that (they don't look like Bogart though🙂), this industry also has its scammers so choose carefully.