??
Maybe a poster that said "Whey,ephedrine,vits & mins" only work.
You couldn't be directly in front of the store but if you were a few feet away, I don't think they could do anything unless you were loud and disturbing the peace. Sidewalks are public property. You might want to word the poster a little better
** "Whey, ephedrine, vitamins and minerals are the only effective supplements. Don't waste your money on magic powders"
then list some of the biggest B.S supps that are out right now
