The point it that by monitoring your location I can derive what is your schedule, where you work, where you do your shopping, the pharmacie you are going to, I

The point it that by monitoring your location I can derive what is your schedule, where you work, where you do your shopping, the pharmacie you are going to, I can know what kind of food you like by looking what kind of restaurant you go, I can know that after work you are regularly going to an hotel for 2 hours, I know where you live, where you kids are going to school, when and where you take your vacation. By looking who's around you I can know who are your friends and how close you are. With all that information, I don't care about your name, I can put you in a category, classify you better that anyone else. If every billboard is equipped with such thing that can be a problem for privacy.