This is true some good reads there. I will take it a step further and say knowledge is power TOO EVERYONE, including predators. That Sig hat, or Glock window sticker, or even that I look for big bucks window sticker tells a thief follow me to find guns, then it's up to him to figure out to get them.
Those little family stick figure window stickers showing mom, dad, Johnny, his two sisters and a cat can tell pedophiles I have young kids.
Open carry can tell robbers shoot me before I even see you. Yes there is a counter argument there but it does not change the possible negative information either.
All knowledge is power, be careful how you use it, and give it away both.