Not sure why you're being down-voted, the Web were designed to be public. If you want to prevent me from taking pictures of the exterior to your Cafeteria on th

Not sure why you're being down-voted, the Web were designed to be public. If you want to prevent me from taking pictures of the exterior to your Cafeteria on the public street you'd have to build a wall / put it behind a login. But then don't complain that you are loosing customers because they can't see it or can not find information to your site through search engines.