My brother lived in and around Sacramento for many years. He says that many people in Rio Linda were druggies, ex-cons and other low-life types. It apparently was common to make jokes. Rush at least was not mean about it.
I’ve heard that same description of Rio Linda from others. You are right — Rush was always good natured about it. That was one of his hallmarks. I never heard him disparage anybody (except Democrats and communists, of course) and he always wanted the best for everybody.