That really does bug me. "Don't tell because someone will think you're a nut/steal your stuff/tell the government/insert fear here".
I don't hide the old cars or M trucks. My books cover two walls of my library. I enjoy and take pride in both and what anyone else thinks, or the off chance someone might try and rob me, isn't going to make me keep them secret or avoid discussions. Basic security precautions, sure. Silence? Can't abide it.
Same with the guns. Those three things are pretty much most of what I do and a big part of who I am and none of them are anything to be ashamed of, nor can I live in fear of what someone might do or might think.
If it bugs them, tough. If they want to steal it, well, that's a chance you take if you have stuff, no matter what you do.