Speaking personally this issue doesn't affect me much or at all. I haven't been travelling this year anyway, but even when I do I don't take pics at riots, demonstrations or crime scenes anyway. The kinds of photographic restrictions you've brought up probably apply mostly to the press and "citizen journalists." Also, I don't really do any street photography of people so I'm not likely to break anyone's laws. I might keep it in the back of my mind but it's equally likely that it would completely slip my mind while I'm touristing.
If I ever happened to take a pic in which there was a person and they noticed and asked me to respect their privacy and delete the photo, I would delete it. This is just out of personal courtesy for others, the law would not enter into it. That is to say, the law of the land may state that I have the right to take any picture I want to in public areas, but that doesn't mean that I am ok with invading people's privacy against their wishes. It's not like I'm a member of the press corps taking editorial pictures of newsworthy value.