For those of you who haven't been tracking the fuss that Facebook started lately, you might want to pay attention. I've linked to an article over at Broadband Reports in the header above.
What's all the fuss about? Simple - technology has caught up with us and internet anonymity is now non-existent. The technology now exists and is in place for multiple sites to all share data with each other about what you've been doing on their sites - what you've bought, what you looked at, who you've talked to, etc.
The reason they're doing this is not so much "big brother" but so they can charge advertisers more money. See the more they can say that they know about you, the more they can charge for putting someone in front of your eyeballs.
Facebook's latest nuclear explosion stems from the fact that they let out a little too much information. Friends don't need to know you went to Overstock and bought a pair of silk underwear. At least not my friends.
I'd encourage you to take a closer look and start tracking where this privacy train is headed. Europe appears to be headed in one direction (legally mandated privacy protection) and the US appears to be headed in another (open season on every tidbit of data someone can get about you - i.e. *no* privacy).