"Please keep in mind that if you opt out, your friends may still share public Facebook information about you to personalize their experience on these partner sites unless you block the application."
But what does "public" mean there? If your privacy settings have information access as "visible to friends only", can "these partner sites" access that data if your friend doesn't opt out of this sharing?
For those who don't want to have to log in to find out:
"What your friends can share about you through applications and websites:
When your friend visits a Facebook-enhanced application or website, they may want to share certain information to make the experience more social. For example, a greeting card application may use your birthday information to prompt your friend to send a card
If your friend uses an application that you do not use, you can control what types of information the application can access. Please note that applications will always be able to access your publicly available information (Name, Profile Picture, Gender, Current City, Networks, Friend List, and Pages) and information that is visible to Everyone."
(I'm pretty sure at least current city wasn't on that list until fairly recently.)
Yeah, you're correct. It's gotten to the point that if you're a Facebook user you either have to not care if your data is shared or remove anything you may have added and care about.
"Please keep in mind that if you opt out, your friends may still share public Facebook information about you to personalize their experience on these partner sites unless you block the application."