Every urban municipality near me has a generic "no constrictors" ordnance. Though it is only enforced against large constrictors, and no one seems to care that pet shops in city limits carry both constricting Colubrids and balls. It all started when one large suburb enacted an animal ordnance on exotic pets that was then copy and pasted into the law books in major municipality after municipality in the region. Hasn't hit the more rural communities yet. Thankfully there are loop holes for educators and entertainers, but it forces the average pet owner to either break the law or move to a moral rural location. Local governments don't seem to care if "no constrictors" is broad enough to outlaw local garters. The response is basically "Why can't you just own a cat or a dog like anyone else?"