It is much more difficult for photographers to earn a living in Europe due to privacy laws, even if a person is outside the home. The Princess of Hannover (nee Princess Caroline of Monaco) uses the court system often as she sues magazines for publishing photos of herself or her family in what she considers private settings. This would include sitting in a lounge chair at a beach or sharing a café au lait with her husband, Ernst August, at a Paris cafe. This differs to US law. It would be difficult to claim the privacy issue in an American court. If you are outside the safety of your home, you are "in public," even if you are doing your own thing.
Here is the link to the German-language story published in the local Hannover newspaper: http://www.haz.de/newsroom/medien/art663,628735