While there is no expectation of privacy when one is out and about on the city streets, it generally means "you can take a photo of a fountain on the city squar

While there is no expectation of privacy when one is out and about on the city streets, it generally means "you can take a photo of a fountain on the city square without getting every tourist that was caught in the photo to sign a release", not "you can rummage through everybody's bags"