What is your opinion on people with bitcoin bumper stickers?

I see that there are bitcoin bumper stickers. For your car, for your laptop, etc.

I was wondering what you would think if you saw someone sport a bitcoin bumper sticker on their car or laptop. Would you think its cool? Or would you think it's only a matter of time until they get kidnapped?

What if instead of it being a bitcoin bumper sticker, it was a sticker saying "Infinity / 21 million"? Do you think that's subtle enough a "if you know you know if you don't you don't" situation? Do you think this person will still be kidnapped because the wrong person might know what infinity / 21 million is?