Does anybody else have rules like this at their mall?

Question

I live near a mall called Mayfair. It is probably the best near where i live, in terms of variety of stores, and the general niceness of it. its very well decorated and maintained. however, it does have a slightly higher crime rate than most malls in the area. As a result of this, sometime come spring, new rules are being put in place. anyone who looks like they are under 30 are going to be carded, and if you are under 18 or "look like you are going to cause trouble" you can be denyed admittance. this is all in attempt to reduce crime. however, i happen to think its a little extreme. the majority of the stores in the mall are not stores that anyone past the age of about twenty four would shop in (some people do, but not many). does anybody else have rules like this in place at their malls? i think its a bit extreme and they are probably going to loose a lot of money because the majority of people shopping there are teenagers. your thoughts?