Facebook Wants You to Vote on Tuesday. Here's How It Messed With Your Feed in 2012.

◼ The social network tries to promote voting, but it also has conducted tests that affect users' voting behavior—without telling them. - Mother Jones

On Tuesday, the company will again deploy its voting tool. But Facebook's Buckley insists that the firm will not this time be conducting any research experiments with the voter megaphone. That day, he says, almost every Facebook user in the United States over the age of 18 will see the "I Voted" button. And if the friends they typically interact with on Facebook click on it, users will see that too. The message: Facebook wants its users to vote, and the social-networking firm will not be manipulating its voter promotion effort for research purposes. How do we know this? Only because Facebook says so.