"I’m concerned about the privacy of my account information. What is done with my Facebook data?
We value the trust that our users put in us, and are committed to maintaining the highest standards of privacy protection.
In order to do analysis on your Facebook data, it is necessary to cache it temporarily on our servers. We acquire the data through the Wolfram Connection app using the Facebook API, respecting whatever privacy settings you and your friends have given to Facebook. Our system is set up to cache your data on our servers for one hour, which allows you to perform queries efficiently. The default behavior is to delete personally identifiable data after one hour."
http://www.wolframalpha.com/fbfaqs.html
"I’m concerned about the privacy of my account information. What is done with my Facebook data?
We value the trust that our users put in us, and are committed to maintaining the highest standards of privacy protection.
In order to do analysis on your Facebook data, it is necessary to cache it temporarily on our servers. We acquire the data through the Wolfram Connection app using the Facebook API, respecting whatever privacy settings you and your friends have given to Facebook. Our system is set up to cache your data on our servers for one hour, which allows you to perform queries efficiently. The default behavior is to delete personally identifiable data after one hour."