Sheetz review: Mask requirement signs but lack of enforcement

We entered the Sheetz store in Conneaut Lake PA on Saturday 05-30-20 at approx 1:35 PM where there were signs on every single door that said masks were required. While we were standing there we counted the customers wearing masks (10) and not wearing masks (20). The people waiting for sandwiches to be made were back to back to back in a couple rows and there were approximately 15 of them. We asked the manager why nothing was being said to the people who were not wearing masks and she responded that they were not allowed to because they were concerned about a violent response. We decided to ask for our money back and get out of the store as fast as possible to avoid the unmasked people. So my question is why put signs on the door for no reason?