People feel bad about having a social stigma; that’s why many of us, and more by passing day, stop smoking so easily.
Shaming big carbon footprints may eventually work for saving the environment, too. Problem is that bad carbon behaviour does not happen in front of other people (except while driving one's car) so it can be kept concealed.
Exhibit 1: Al Gore’s nightly fully-lit mansion shamed lightless by investigative media. Spectacular.