I'm reluctant to use Facebook auth on new apps for two other reasons: 1. I don't know at the time what you want to use my information for, especially in regard

I'm reluctant to use Facebook auth on new apps for two other reasons: 1. I don't know at the time what you want to use my information for, especially in regards to showing up on my or, more importantly, my friends' news feeds. 2. I have to manage what information I share on Facebook itself rather than on the app or website.