Psychologists in Canada may have found out that people who become eco-conscious consumers are "more likely to steal and lie" than others. Authors of the study are Professor Nina Mazar of the University of Toronto’s Rotman School of Management and her colleague Chen-Bo Zhong. "Buying products that claim to be made with low environmental impact can set up 'moral credentials' in people’s minds that give license to selfish or questionable behavior."
You don't say!
The paper can be read in full online here (pdf-format).