Pew Research Center's Internet & American Life Project
Although 86 percent of adults surveyed in a recent poll take pains to hide their online identity, more than half said that that online anonymity was impossible.
About 59 percent of 792 respondents told the Pew Internet and American Life Project that it wasn't possible to be completely anonymous online, according to the Pew Research Center. Those with "college or graduate education" tended to clear their browser history, disable cookies and not use a website because it asked for too much personal information.
When users post material online, they are more likely than not to attach their name or a recognizable screenname to their material: 49% of internet users say they have used their real name and 47% use a screenname or username that people associate with them. At the same time, 25% of internet users say that they have posted material without revealing who they are.