Do you really believe that the police is going to knock on his door? Come on! Get real!
If he lives in a small town, and especially if he is already known to police its possible. Is it likely? No. But whats the harm in it? Maybe if you are really lucky he has a record and is already known to police. A friend of mine once got harassed by someone via phone that he sold a car to on ebay long distance. He called the local police, they sent a cruiser over to the guy's house. Not a single call happened after that.