So I'm walking into my local Buffalo Wild Wings when I see this on the door.

I've been in a few BWW before and never saw one of these signs, so after I was done eating (and of course carried inside anyway because this is in no way legal signage in Texas) I decided to talk to a manager.
I lucked out and happened across not one, but two managers standing together. One had a tag that said "General Manager", and the other's had an extra word on his tag making it read (I'm pretty certain on this but part of the tag was obscured) "Regional General Manager". I asked about the sign and was told by the GM it was a BWW corporate policy and all their restaurants have the same sign. I pointed out that I had been in several that did not, then the RGM said all corporate stores are marked, if I had been in a franchise store they were not required to post the sign so that's probably what happened.
The GM got extremely defensive and said the policy was for the safety of the patrons. I pointed out that the only people that would even come close to following the policy were the law abiding ones, then told him it wasn't a legal sign for Texas CHL holders anyway and they could carry inside with impunity, and ended with asking him if he realized that if someone was going to enter their restaurant with the intent of harming someone, a simple sign wouldn't stop them. I then touched on the background checks that CHL holders have to go through to which he replied "That still won't stop someone from getting mad, pulling a gun, and shooting someone." At this point he got totally flustered and stomped off leaving me with the RGM.
Now the RGM was a completely different matter. Once the GM fled, he was calm and said that he was aware of the background checks and knew that CHL holders were the least likely to ever cause a problem. He also said that I wasn't the first person to discuss this with him recently, I was at least the fourth person to do so. He said unfortunately he couldn't change the policy offhand since it was direct from corporate but he would make sure to bring it up at the next board meeting. Now I don't know if this will ever happen, but at least he didn't get defensive and storm off.
Needless to say, the food wasn't anywhere near good enough to go back and deal with their corporate mentality.