New York is in the midst of graduation season, when freshly minted scholars don cap and gown to accept sheepskins and jobs they will probably remember as their most demeaning. But first they'll have the opportunity to ingest the wisdom of their commencement speakers. Also, it's an opportunity to get on TV and be tackled by security guards. David Letterman ran a top-ten list of signs that you have a bad commencement speaker. Shockingly, no......