While your post is a nice little piece of tongue-in-cheek humor, here is something that might be interesting to consider under certain situations.
Say you have a neighbor who is vehemently opposed to private ownership of firearms.. but it doesn't stop there. At neighborhood get-togethers, he makes fun of you and your position and you know that he is actually quite serious because he has mentioned a number of times that he doesn't like the idea of you having so many guns right next door and has even contacted the HOA to see if something could be done about it.
If you have someone like that, put a sign in your own yard the points to his home, with his address, stating something to the effect that "To all burglars, robbers, and home invasion perps. The house next door has no firearms and the owner is strongly opposed to self-defense".
Wonder how he'd like that one?