"How is Facebook changing our privacy habits for the good (or bad)?"

Facebook is starting to affect our privacy habits for the good, by making us interact with strangers more easily, not to mention be more open. We can speak with others more easily, and eventually learn about them.
However, facebook is beginning to affect our privacy habits for the bad, as sometimes we cross the 'line' when we share information with them. As when we learn about them, there's a good chance they learn about yourself.
The 'line' itself is hard to see, as sharing information with someone may not be all that bad, but depending on that information, it could also be very dangerous.
Sure, it's alright to speak to others about whatever subject, but it would be best to keep things vague, not naming certain individuals or places.