Tobacco/Alcohol and Mobile Marketing Legalities?

I was wondering what the laws are regarding tobacco and/or alcohol and mobile marketing. For example, a business happens to sell tobacco/alcohol and uses mobile marketing to promote the product. A minor opts into receiving electronic coupons and receives an ad (which goes out to all users who have opted in) promoting tobacco/alcohol. Is that illegal? After all the minor did opt into the text alerts. Is there any way to get around this issue? A legal way to protect the business without sacrificing this new form of advertisement?