Contrary to popular belief, stealing an identity is not at all complicated, it's actually very easy. All it takes is the right tools and viola! people are victimized by identity theft.
Need proof that it is simple, Parents will steal their own childrens' identity. Three year old Junior has utilities in his name; if a parent can do it to their own child with no training or know how, how hard can it be? All a trained identity thief really needs to get started is a single piece of information. With the right know how a name, an address or even a phone number can lead them to what they need.
In many cases all they need is that starting point to find plenty of information that is public record under the "Freedom of Information Act" or similar laws in other countries. Think about what you are posting. You may be putting others at risk, something that you would not want them to do to you!