Advertising is designed to influence what people buy, but some products have been repeatedly associated with serious health or social harms when consumed excessively or over long periods. This has led to growing debate over whether cities should restrict advertising for products that scientific research has linked to harmful consumption, particularly in public spaces where people are exposed to advertising regardless of whether they are actively seeking these products. The question also raises broader issues around individual responsibility, commercial freedom, public health, and the role of local governments in shaping the environments in which people make everyday choices.