Re: can I has all your data?
Facebook doesn't have access to your location, phone book, call log, etc. on iOS. I have it disabled from getting access to my location and contacts because I refused to give it permission when I installed it, and it can't access the call log or accounts.
While there are ways around this stuff on Android, pretty sure a big company like Facebook is not going to use security issues in older versions of Android to access this data without the user's permission. That would be a pretty big hit of negative publicity, even for Facebook.
Zuck has no idea where I am or who I know outside of Facebook. Well, that latter is not strictly true, people who stupidly allow Facebook to access their contact list and have me in their contact list but not on Facebook will be known by Facebook I guess.