Because you are in denial does not mean that cannibalisim was not common. As common as the quick reversion to cannibalisim that took place at Donner Pass among a group headed to California in covered wagons that were trapped in the the Pass by heavy snows. These would be settlers ate each other with relish...lol.
There are innumerable cases of prehistoric human bones unearthed with scrape marks consistent with those left on animal bones, good evidence that stone tools, knives, had been used to remove meat from bone.
You too will be on the menu if people around you begin to starve.
It is hilarious how many are still in denial about cannibalisim after anthropoligists, palentoligist and a host of scientists have proven beyond a doubt that it did occur with frenquency and continues to occur in parts of the world today. See 'The Blank Slate' S.Pinker pg.320.
'The Wari people of the Amazon have a set of noun classifiers that distinguish edible from inedible objects, and that the edible class includes anyone who is not a member of the tribe. This prompted the psychologist Judith Richard Harris to observe;
In the Wari dictonary
Food's defined as not a Wari
Their dinners are a lot of fun
For all but the un-Wari one'
So, if you really believe what Arens and Obeyesekere profess, I suggest you hang out for a while in Wari country to prove the courage of your convictions. Take the salt and pepper.

I found these excerpts from Aren's The Man Eating Myth.

However, the evidence supporting its existence [cannibalism]is abundant and is represented in every medium imaginable, including stories, symbols, legends, writings, archeological evidence and first hand accounts. Cannibalism is a practice that reaches across centuries and cultures. In many cultures, it is considered atrocious and sacrilegious, whereas in another culture it is a sacred and revered custom. Cannibalism is an undeniable occurrence rooted in antiquity and branching forth to the present-day.

A wealth of archeological and anthropological evidence discovered in Africa, Australia, New Zealand, the Far East and Middle East further suggests the far-reaching capabilities of cannibalistic practices.

Are we missing something from the "ethnographic record"?

... for the convenience of TV, you can only be one of two kinds of human beings, either a liberal or a conservative. -- Kurt Vonnegut