I think the issue is "available to the whole world". "Back in the day" people would take photos or even videos (remember camcorders?) and it wasn't a big deal b

I think the issue is "available to the whole world". "Back in the day" people would take photos or even videos (remember camcorders?) and it wasn't a big deal because well, only that person would have it and maybe show it to some friends or family (or give you a copy). But now it means archived for the whole world to see, potentially forever. 30 years from now, someone might dig it up. So it's not so much about the photography (which as someone pointed out, might be allowed in public places), it's about posting the photos/videos into a potentially eternal public archive.