I think that partly depends on the alternative. If it's a choice between "take photos including people who don't want to be photographed" and "don't take photos

I think that partly depends on the alternative. If it's a choice between "take photos including people who don't want to be photographed" and "don't take photos", I think a lot of people will take the first. If there's an option of "take photos, and people who don't want to be photographed can bugger off, just don't inconvenience me", I think a lot of people will happily take that one.