Such bans are easy to side step.  The San Francisco ban has already been circumvented by McDonalds who has started selling their Happy Meals without the toys and then selling the toys separately for a nominal price [1] . Banning the sale of any toys in fast food restaurants would be difficult without prompting legal action from the companies. The steep legal costs of defending such a law would waste public resources that could easily be put to better use.  [1] Eskenazi, Joe. “Happy Meal Ban. McDonlad’s Outsmarts San Francisco.” San Francisco Weekly. November 29, 2011.