Board Thread:Off Topic/@comment-25121612-20130724013349/@comment-4705438-20140131085852

"While few  Bosmer perform Arkay's rituals when burying the dead, the more primitive Bosmer still practice cannibalism upon their enemies, which reduces the number of available corpses. As would be expected from such a backwards people, they have an intolerance of Necromancy that goes beyond all reason. Many Necromancers who practice our Arts in Valenwood become "one with the trees" themselves."

--- Corpse Preparation, Book I

So... I don't think many modern Bosmer are cannibals. Certainly not outside the Valenwood.