Young people are un-tagging pictures , writing false posts to ensure privacy . Code known as 'vague-booking ' is used to prompts messages from friends . Some youngsters are adopting parallel identities for things like gaming . Report says teenagers are increasingly concerned with what strangers see . Contradicts Facebook founder Twitter 's claim in 2010 that people have become more comfortable with posting private information online .
Young people are un-tagging pictures , writing false posts to ensure privacy . Code known as 'vague-booking ' is used to prompts messages from friends . Some youngsters are adopting parallel identities for things like gaming . Report says teenagers are increasingly concerned with what strangers see . Contradicts Facebook founder Mark Zuckerberg 's claim in 2010 that people have become more comfortable with posting private information online .