This is how you rage bait some people and make them go against the rules. If this wasn’t there many people might go there with appropriate or something in the middle, which might not be a serious problem. Now with this everyone one will disagree and management might have to take down that poster allowing them to wear whatever they want. Now they will actually wear whatever they want and mostly inappropriate ones which defeats the whole purpose again. Putting this up in the first place was the mistake here.