Are avocado seeds edible?
I can't advise on any of these, so I'd normally put this in a comment, but it's a bit long.

Searching on 'how to cook avocado seeds' found a few articles on the topic:


http://www.livestrong.com/article/31737-eat-avocado-seeds-nutrition/ : calls for grinding it in a 'powerful food processor' and warns that it might damage lesser ones.
http://www.wisegeek.com/can-i-eat-avocado-pits.htm : calls for drying it for several days, smashing it with a hammer, and then putting it in a food processor or blender (against warning that it might damage them)
http://eattheweeds.com/forum/index.php?topic=973.0 : mention roasting then grinding (and has links to the various reports on toxicity in animals)
http://www.veggieboards.com/forum/188-raw-food-support-forum/138169-eating-avocado-seeds.html : mentions drying then grating it (but they were making a facial scrub, not food).
http://www.ehow.com/how_8171238_boil-avocado-pit.html : calls for grating it (without drying) then boiling it (but this one also seems to be for facials, not eating)


The only common thing between all of these is that they call for getting it smaller before eating.  Most make it into a powder first if they're planning for consumption.  I don't know if grating it first might make it safe to go through a food processor without damage.  (or if you could grate + boil then process)