The Aston Kutcher use-case is more appropriate for twitter. IMAPSN relationships are reciprocal and the target use cases involve actual friends. To avoid backlo

The Aston Kutcher use-case is more appropriate for twitter. IMAPSN relationships are reciprocal and the target use cases involve actual friends. To avoid backlogs of status updates the relationship has statuses of asleep, neglected, and active which can affect the list of message recipients. Friend of friend is addressed by a few constraints on comments.