It's a neat idea, but take the second photo in the article for example: The guy gawking (well who knows, but it could be construed that way) at the women doesn'

It's a neat idea, but take the second photo in the article for example: The guy gawking (well who knows, but it could be construed that way) at the women doesn't even have his face visible. Yet just from the clothing and context, his friends and colleagues would probably be able to identify him. That said, if it works, your suggestion would probably cover >90% of cases.