There has been a lot of concern about young people posting too much information about themselves online, but according to a new study, 92 percent of children have some type of online presence by the time they are two years old.

Obviously, it's not the fault of the kids. A third of mothers posted pictures of newborns -- and a third also posted sonograms of their as-yet unborn child.

The researchers found that the average "digital birth" of children worldwide happens at about six months, with a third of children having photos of them posted online within two weeks of birth.