Are all online photos of Tobita illegally taken?

So I just went there recently and saw pretty much every stall have a no photo sign, which was fair enough. But then I saw someone get told off for taking photos of the street, so I’m guessing the entire area you can’t take photos.

I have 2 questions about this. 1 is how they’re able to prohibit photos being taken on the street since I thought that it would be a public road. 2 is that I see many photos/videos of tobita online so are all those just taken illegally?

Not sure if this is normal but I saw a tonne of police today.