There is a guy in my neighborhood, that is one of the meanest people I have ever known, and he was given an appropriate nickname to reflect that. He actually climbs up trees to get to the dwellings built by birds, places little boards on the top of them to seal the tiny homes, and then he would place a small secured door in the front of it. Because he refused to give the returning birds the key, we referred to him as the “Lock Nest Monster”.