Just like with hats, shirts, and other apparel I'd prefer that my truck be incognito as well.
But again...that's a personal preference. It might be wiser to be incognito in bad neighborhoods. If we know we are going to the opera, we dress accordingly. Speaking of bad neighborhoods and such...having a certain type of vehicle alone makes a good target in some areas even if it's "incognito".......it's two tons of stuff that can be taken and sold. Your NRA sticker on the back window will only fall to the ground with the broken glass, or the broken glass can fall by itself without a sticker.
Is there anywhere in America you would be willing to wear what you wanted to without fear?
If you live in gangland territory, then more than likely clothing would be an issue. But the rest of the country is ours. How is it we put thoughts into other people's minds? I'm just sayin'. I know how these threads have turned out before. I'm not one to adamantly say one way or another, and I accept all as true and valued opinions based on circumstance or ideals.
As to the OP...good idea, or bad idea? I'm neutral. Just making a point. Disseminate what's presented here, but it's going to come down to your own personal decision. Consider your environment...if you see gun stickers on vehicles every day in your area, then statistically you're just as likely as the rest of them to make a mark for a hit if you have one too, and more than likely you're not living in gangland territory.
One thing to add here that may have been overlooked............some folks in this country are making a stand for their rights. It's public knowledge we are going to take back the streets and crime needs to be back on it's heels wondering when and where it will meet it's match. I honestly don't think anyone has posted up the possibility that a gun sticker on your window might very well be a good deterrent.