Hey Proto, just think if you had a food store on Main St., flogging food and next door you had a Penis Enlargement store, How would you advertise it? You would have to have a picture of a bloke with a big prick hanging between his legs. The coppers would have a field day arresting you and your employees.
Mind you that may not be a bad Idea, In Vancouver BC Canada, a store called Dekap coffee house advertised a joint for sale, the coppers took no notice until a reporter from a TV station went into the store and reported that this store was selling pot. That blew the lid off the top, business went from $5000.00 per day to more that $50,000.00 per day. Then of course the coppers came in a shut the fucking place down. There was a hue and cry from it's customers. The shop opened again the next day and business tripled over night. Of course the inevitable happened the city took their business license away and that was the end. For now anyway.