Cognitive dissonant humour. Ya gotta ambiguously love it.

Unquestioning moral authority of the green police:

http://www.grist.org/article/2010-02-08-the-unheralded-significance-of-the-audi-green-police-ad/

San Francisco mocking:

http://www.nbcbayarea.com/news/green/San-Francisco-Mayor-Responds-to-Green-Police-Super-Bowl-Ad-jw-83817937.html?