> no implicit right to anonymity

Check the privacy laws of the United States - they clearly do protect our right to anonymity: http://en.wikipedia.org/wiki/Privacy_laws_of_the_United_Stat...

In this case I see both violations of False Light and Appropriation being possible, if these guys didn't do anything, and didn't agree to be involved in this stunt.

Personally I like the idea of vigilantism, but these things are better left to law enforcement and the legal system. They are in place for a reason, after all.