Unexpected visitors...

Three nights ago, we had some unexpected visitors. While I was at work, someone rang the doorbell.

When my son went to open the door, this is what he found, along with a rather odd message reading, "Merry ****ing Christmas. I hope you **** someone. - Santa":

Weird, right? It was probably just some kids pulling a prank, but I found it upsetting, especially since it happened while my son was home alone. When I got home and saw the note, I called the police (non-emergency number, mind you), and an officer came out. He agreed that it was probably just a prank by some neighborhood kids. He took the visitors to be impounded as "found property" and said that he figured someone would call in the morning upon realizing that their holiday lawn decor was missing.

Bizarre, right?