A cursory reading doesn't make it sound like that would present a problem. Sounds like they want to shut down blanket queries of all apps (without a ligitimit reason, such as the couple examples provided). As Facebook is commonly used for login, would think any app could query that app as it would certainly have a ligitimit reason to do so.
p.s. No this doesnt also affect all Apple users. I have no Facebook account, and have no problem logging into all my accounts