Editor's note: Editor's note: Douglas Rushkoff writes a regular column for CNN.com. He is a media theorist and the author of the upcoming book "Present Shock: When Everything Happens Now."

(CNN) -- I used to be able to justify using Facebook as a cost of doing business. As a writer and sometime activist who needs to promote my books and articles and occasionally rally people to one cause or another, I found Facebook fast and convenient. Though I never really used it to socialize, I figured it was OK to let other people do that, and I benefited from their behavior.

I can no longer justify this arrangement.

Today, I am surrendering my Facebook account, because my participation on the site is simply too inconsistent with the values I espouse in my work. In my upcoming book "Present Shock," I chronicle some of what happens when we can no longer manage our many online presences. I have always argued for engaging with technology as conscious human beings and dispensing with technologies that take that agency away.

Facebook is just such a technology. It does things on our behalfwhen we're not even there. It actively misrepresents us to our friends, and worse misrepresents those who have befriended us to still others. To enable this dysfunctional situation -- I call it "digiphrenia" -- would be at the very least hypocritical. But to participate on Facebook as an author, in a way specifically intended to draw out the "likes" and resulting vulnerability of others, is untenable.

Douglas Rushkoff

Facebook has never been merely a social platform. Rather, it exploits our social interactions the way a Tupperware party does.

Facebook does not exist to help us make friends, but to turn our network of connections, brand preferences and activities over time -- our "social graphs" -- into money for others.

We Facebook users have been building a treasure lode of big data that government and corporate researchers have been mining to predict and influence what we buy and for whom we vote. We have been handing over to them vast quantities of information about ourselves and our friends, loved ones and acquaintances. With this information, Facebook and the "big data" research firms purchasing their data predict still more things about us -- from our future product purchases or sexual orientation to our likelihood for civil disobedience or even terrorism.

The true end users of Facebook are the marketers who want to reach and influence us. They are Facebook's paying customers; we are the product. And we are its workers. The countless hours that we -- and the young, particularly -- spend on our profiles are the unpaid labor on which Facebook justifies its stock valuation....MUCH MOE