Haven't seen it - but I'm not going to announce I'm carrying.
I thought the idea behind having a CCW was to carry and NO ONE KNOWS IT.
I wouldn't use it. It makes you a target and draws attention, and gives a warning, so you lose the element of surprise.
I do however have stickers which I had printed and they are on the cellar windows and doors of my home.
"Unauthorized entry may result in personal injury or death." Which could mean anything. But I suspect I'd think twice about breaking in.
You can run... but you'll just die tired. 3%
Not only will it let law enforcement think you have a gun,it will let the bad guys think you are armed,giving them the advantage
to have their guns ready first(giving them the drop on you first).
Also breaking in to your car,looking for guns.
'Rights' do not require License. Rights can only be denied. Not only is this 'sticker' a bad idea... it reenforces the perception that Bearing Arms requires government permission.
Why would anyone want to announce that they are carrying? During WWII the Nazi's made the Jew's wear labels on their garments (Star of David) so they could be easily recognized by the SS and the Nazi party people for harassment or extermination. Besides, if you are pulled over, the LEO runs your plate and it comes up anyway. Don't paint a target on yourself.