> The advent of Do Not Track threatens the barter system wherein consumers allow sites and third-party ad networks to collect information about their online activities in exchange for open access to maps, e-mail, games, music, social networks and whatnot.
[Do Not Track? Advertisers Say ‘Don’t Tread on Us’](http://www.nytimes.com/2012/10/14/technology/do-not-track-movement-is-drawing-advertisers-fire.html?_r=0&pagewanted=all&gwh=547A8509E6EE3202DC31C8D3835F1ACA)
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