The FCC currently regulates television, radio, and other media outlets.
FCC Work within the system.
Right now, today you have a clear and relevant example of a problem and a solution. The tabacco industry and how they are marketing their products. The key is convincing enough people that the fast food diets, etc., are bad for them and require regulation. Right now that point of view is not pervasive. It isn't getting the attention of the agencies that can create change.