Because more than two-thirds (67%) of the US's adult Net users now use Facebook,* you'd think that it's common knowledge that Facebook really can't be described as a single activity for one person, much less a single activity for everybody who uses it. You'd think that we'd take headlines that make generalizations about people's Facebook use with a grain of salt (especially those written back when … [Read more...] about To grasp social media’s effects, we need a grasp on social media!