Protect yourself first
"The amount of information we can find on a person from Facebook, LinkedIn, Twitter, and blog postings [is significant], and that's without leaving the office,"
I think that says a lot about how the information is leaked not by the efforts from the hackers but by the stupidity of most people. In the physical world counterpart, if you leave your door ajar, there will be people who'll peek inside and you can't really call them bad people. Same goes for the e-world - protect your own stuff before you blame others.