Things I find stupid...

I know I tend to over analyze things, but normally, the red circle with the bar will overlay a symbol of the prohibited action (e.g. the no smoking or no firearms signs).  What is it supposed to mean if the "prohibited" symbol isn't on top of anything?  No invisible pink unicorns allowed?  They're really leaving themselves open to all the noisy illiterates that hang out in the the French Quarter.  I'm going to suggest installing a speaker system that gives a "shhhhh" to every person that walks by...