Smug Alert!, från Wikipedia:
Kyle's father Gerald buys a new hybrid car and drives it all over town to show it off and gain attention. He soon decides that his commitment is not enough and starts an unwelcome campaign to convert the other townspeople to environmentally friendly vehicles.
When Prius owners were asked in a survey why they bought the car, environmental concerns came in at fifth. Fifth?
Top of the list was it, "makes a statement about me." So the market tells us that people are prepared to pay more for an inferior product in order to display to others their environmental concern.
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