Richard Stallman, creator of the GNU Project and founder of the Free Software Foundation, believes that companies like Facebook and Google aren't helping their users, but are in fact doing the exact opposite because of how they run their social networks. In an interview with RT, he briefly criticized both Facebook and Google+, but then underlined how the former has worse practices than the latter.
"[Facebook and Google+] mistreat the users," Stallman said. "For instance, by requiring users to give real names. That's a policy that puts some people in danger. So, you shouldn't use them. But Facebook does many other bad things as well."
"Facebook does massive surveillance," Stallman continued. "If there is a Like button in a page, Facebook knows who visited that page. And it can get IP address of the computer visiting the page even if the person is not a Facebook user. So you visit several pages that have Like buttons and Facebook knows that you visited all of those, even if it doesn’t really know who you are."
Over the last few months, Facebook was accused multiple times of using cookies to track users even after they log out of the service, though it has since fixed the issues and explained how its system worked. For more information about how this story, the multiple follow-ups, and the ensuing PR disaster, please see the links below.
You can watch the Stallman interview, which discusses many issues beyond Facebook and Google+, above. I have contacted Facebook to see what the company has to say in response to Stallman's statements.