If I look in google for pictures of those places there are plenty of people in them. I'm talking pictures of streets full of people or cool looking buildings with lots of people sitting around in the grass. I don't imagine the photographer went to talk to each person all the way to the horizon to ask permission, and I imagine, in the time one sets up the camera, multiple people probably enter and leave the view. There really is no practical way to take pictures of these places without people unless you get the help of authorities to close off these spaces and get everyone out of the way. So how do these laws work?