In this case, though, the ID is not falsely identifying the individual. While I suppose you might get in trouble with the cards in the article -- which falsely

In this case, though, the ID is not falsely identifying the individual. While I suppose you might get in trouble with the cards in the article -- which falsely claim they were issued by certain organizations -- I don't think there'd be anything wrong with an official-looking "photographer" ID that does not make such claims. Whether created yourself or under the aegis of a photography club, it would have the same defusing effect on fake law enforcement. Apparently, a variety of real, non-governmental organizations already issue such passes: http://en.wikipedia.org/wiki/Press_pass#News_agency_cards http://en.wikipedia.org/wiki/Press_pass#News_agency_cards