This is a good explanation of why it is way past time to stop using your Facebook ID to login to other sites. Personally while I still occasionally wish I could login to facebook to check on relatives, otherwise I don’t miss it at all.
No matter what facebook do, there will continue to be security and privacy breaches like this. Facebook wanted to become “the web” and along with that aspiration, they also became a focal point for all the hackers, scammers, and those wishing to game the system.
Source: Why You Shouldn’t Use Facebook to Log In to Other Sites – The New York Times