Appreciate your thinking out loud and sharing.
In a similar bent, is not walking out of your home dressed for hunting "advertising" that you have firearms? The same for going to the range w/range bag and pistol cases, or decal/stickers on your vehicles. The very lifestyle could be said to make one a target.
I used to be one of those people that would not put anything on my vehicles that indicated even slightly that there might be guns found there. There were none left unattended, but someone would have had to break in to find that out.
Instead now I have an alarm system at home. Nothing will be found inside easily; then getting access to them will be considerably difficult. In short, I have hardened things up.
The problem for the person with one gun is non-existent if it stays with them. Quality gun safes if bolted down solidly are good protection.
There are risks in life - we should look to minimize them - but I will not abrogate my choices because some people are not honest. I will make their life style choices more difficult.
BTW - stolen guns do NOT bring higher than retail figures - generally considerably lower.