Was in the neighborhood pool today when I saw someone checking ID cards. To my surprise I was told that they only check your card if you are not in the pool and sure enough that is what happened.
I may be stupid but I am not dumb. The way they keep non residents from using the pool is to only check the ID of people not using the pool. So, to not get caught using the pool without an ID, all you need to do is to be using the pool when they check. I am sure that there is a back story for this but as someone who writes security procedures for a living, this is ludicrous.