Facebook suicide
n.— «I have been cheered recently, though, by the news that an increasing number of users are committing what is known as “Facebook suicide”—erasing their profiles and returning to life in the real world, presumably sick of the shallow allure of living your life in cyber space.» —“Why I hate Facebook” by Janet Street-Porter Daily Mail (United Kingdom) Feb. 6, 2009. (source: Double-Tongued Dictionary)