The 20 trees, the plethora of soft toys and all the otherreminders of a broken Christmas seem to tell some that that is no longer the case and that it may be more dangerous leaving the subject alone.
Each contact card also comes with a history of communications between you and the other party, providing gentle reminders of when you last checked in with your neglected friends.
There was much talk about that "other" conference, as well as periodic reminders from Wurman that TED was not to be invoked--even when he and his returning guests were reminiscing about their glory days.