“The steady advance, and cultural power, of marketing and advertising has caused 'the displacement of a political public sphere by a depoliticized consumer culture.' And it has had the effect of creating a world of virtual communities built by advertisers and based on demographics and taste differences of consumers. These consumption- and style-based clusters are at odds with physical communities that share a social life and common concerns and which participate in a democratic order. These virtual communities are organized to buy and sell goods, not to create or service a public sphere.”