PS: I love the edit functionality. Finally. PPS: Check @steptalks followers to see who recently joined the network. You can't edit after mentioning someone.
Probably yes. Or some kind of "private mentions" maybe? You would start your post or write your mention with a special character, something like @@lucian, then the post and following replies would only be visible for the two users involved... That idea just passed over my head... :) Probably not the best to implement though.