At least for now, it's not meant for private/sensitive messages.
We're more focusing on allowing people to join chatrooms which the location information are to help people easily find them, there's also an invitation feature to let you tweet your room and people can join all over the world.
There are so much awesome APIs on iOS 7 that we planned to leverage in the future, cutting off legacy platforms simply help us focus on looking ahead instead of backwards.
There's a third party plugin for Xcode claims to do this called MoarFonts and asked you for $10, however I have not tried that. Runtime attributes patch wouldn't take effect instantly in IB but it works reliably well in our experience.