Political consumerism is probably the main avenue of political expression for young Americans today- which is telling, in part, of just how tied up in the market system our culture is. Organic, free-range, Fair Trade, Green, everything has a label that can make you feel good just by buying it.
Cathy Kaufman has a really interesting article, entitled Salvation and Sweetness: Sugar Beets in Antebellum America about an earlier political consumerism attempt in American history. Definitely worth a read. Is 'Fair Trade' the 'free sugar' of today?