Most gunowners are aware of this. It's just common sense to be discreet and private. And there are some who want to express themselves and don't see a problem with that. Especially on social media.
I know many freedom loving gun owners want to express themselves humorously and want the express their love for the second admendment. That's your 1st Admendment rights. But I think posting these types of signs and bumper stickers, T shirts and gun logos make you a target for break-in. You are telling thieves you have guns in the car, on your person and in your house.You are telling the police that you are armed. You are telling the whole neighborhood. Many people are not gun friendly and don't find them to be amusing and might even use it against you and get you Canceled. What's worse is that in a self defense situation, the law can use that against you even if you are justified,