Say What?

My dear one and I were driving our golfer son home from the golf course the other evening.  After practicing for two hours he was a bit thirsty so we stopped at a gas station so he could grab something to drink.

I was sitting in the truck waiting and looking around.  Right in front of me I saw a sign that made me do a double-take.   And it make me take a photo.

The sign was on the door leading into the cooler which holds the cold drinks.  Unbelievably, it said "Not An Exit".

Had someone or someones actually tried to get out of the store through that door.  Or, perhaps it's a law that inside doors have to be so marked.  I'm not sure which.  Either way, what does that say about our society?  Weird.