Ive seen this idea alot lately....that we ought to just be offering our personal information freely on the internet as if God is going to save us from our own "stupidity". A man in my church just signed up on another message board where I am too, and he kind of let it be known how surprised he was that he was the only one who had used his real name. His FULL real name.
If it were true that God saves His children from ALL bad things happening to them, then we'd never have our identities stolen because we put ALL our info out there on the web, no Christian would ever be stalked by a stranger, and Christians wouldn't ever be taken advantage of by people they trusted blindly.
He does tell us to be harmless as doves, but wise as serpents.