Nina Planck, author (her very good book, Real Food, is out next month in paperback) and former vegan, politely assails the practice of not eating animal products in "Death by Veganism." It’s from the NYTimes op-ed pages, so she’s appropriately constrained.  I wish she’d put it more strongly. Something like, Veganism is a colossal arrogance, a refusal to admit to our own nature, a denial of our humanity.  Sometimes it kills people. And it’s not very much fun, besides.