But the excellent article you linked says you do not need permission to sell a photo of a person taken in a public place, so selling does not necessarily change everything. If it did, newspapers and magazines could not publish news photos without getting model releases, and that's just not possible. The article did say that if a photo is being used in advertising, and the photo shows an identifiable person, then the person could argue that it's use implies that he endorses the product. Otherwise, the law now is that any photograph taken in a public place of people who are out in public can be used or sold. This might change because some photography groups are sending out alerts about possible legislation in Arizona.