Yea i definately agree they need a standardized sign like that of the legal age to buy tobacco and acohol placed on the front door of the establishment or at the counter by the dorr.
I don't want standardized signs...I like it to be a legal gray area. Standardizing the signs takes all the question out of it.
As it is, I may or may not see the sign, may or may not recognize it for what it is and it is not clearly spelled out that I must recognize it.
The legal ramifications of ignoring the random signs don't outweigh the personal/physical ramifications if I should be caught unarmed in the establishment at a time when I needed to be armed.