This invites the question of whether people are aware of this at some level, and do green or other things for the purpose of gaining self-license. So, for instance, one who wishes to indulge in vandalism could gain a moral self-license for that activity by eating a vegan diet.

Or, one could shop at an organic grocery store to the same end. This of course places the organic grocery store in the position of selling moral licenses. Which also makes appalling sense.