Social Media Sneaks in Face Recognition

Kimihiro Hoshino, AFP / Getty Images

Facebook CEO Mark Zuckerberg delivers a keynote during the Facebook f8 Developer Conference at the San Francisco Design Center in San Francisco on September 22, 2011 in California.

Social-media companies quickly learned that users adjust better to "opt-in" features than options that are forced on them. But that's not always a good thing, especially when it comes to facial-recognition software, writes Evgeny Morozov at Slate. Opt-in features can still become basically inescapable. "To assume that a given technology isn't problematic because its users can turn it off seems misguided. Why disregard the possibility that, once enough people opt in to use it, the collective adoption of this technology might dramatically transform the social environment, making nonuse difficult or impossible?"