Why would I want to post a sign, like the one you suggest? What would be the point?
Why not? You can't be worried that it might make you a target, can you? Plus, the police are always there for you.
It would show the World your resolve not to own a firearm.
"So no one has ever broken into your house, period. Do you think the reason for that is because you have a gun? "
That's great! I should wait until after it happens. Got it. We are semi-retired, we are home a lot.
The point you are missing is, the police aren't there during a crime. I choose to have a firearm, you do not. That's OK. No problem.
Thank God for the Federal Reserve. You can't have big government or big wars without them.