Something to hide?

I have always felt that those who express most concern about online indiscretions had something to hide themselves and were projecting their fears onto others. Earl Mardle in a comment to a previous post puts it well:

And while online indiscretions may be a problem, among the upcoming generation those who have polished, indiscretion-free online personas will NOT be trusted because they not only have something to hide like everyone else, they are too good at doing it.