Who's the blame? Her!
People dump all kind of personal data into facebook, linkedin, twitter.
You don't need criminal motivations to find such personal info, imagine you work with clients and you want to know a little bit more about who you are really working for, then google is really really your friend. With just an email address your can find a ton of info, full name, phone number, address, employer and much more.
That's why I never had much sympathy with social networks, I see people without a clue exposing their life to the world eyes.