I'm starting to think this is a really great idea - to have somewhere to keep a private personal history - particularly for checking in to keep a track of where I've been without appearing to be a self-important moron. You know who you are FB friends!

that's a really interesting concept

you could probably do it today without the use of a private account

i believe in app settings, you can restrict the visibility of posts by any particular app. this way, your scale's posts could be seen by just you and not your friends.