There's no user interaction (certainly no "ask the user") so it isn't nagware! The banner (which is the only UI element)  only shows if we successfully log the user in, to let them know that's what happened.

Also, the Facebook SDK only gets loaded if the user is eligible for autosignin. We're also avoiding loading it on mobile for now, pending the result of a test into the efficiency of Facebook autosignin on mobile devices. Come have a chat with us if you aren't happy with the approach?