It shouldn't, you wouldn't be able to photograph candid moments in public of your own family/group of friends if anyone's else face showed up in the picture, that's not a world I want to live in.
It would also completely kill any form of street photography, even if you don't appreciate the art it would kill documenting times and places for posterity, for what benefit exactly?
It would also completely kill any form of street photography, even if you don't appreciate the art it would kill documenting times and places for posterity, for what benefit exactly?