In San Diego, they hung notices on doors either asking people to save energy or telling them their neighbours had reduced energy usage. The latter was a more effective method of social change as it reduced energy usage more
Not all research agrees on the role of social influence in changing social norms - a review of studies aiming to change social norms to reduce drinking in students found only small effects on drinking quantity
There are real-life examples of how obedience brings about social change e.g. smoking in public places used to be common but has now reduced due to changes in law and fines