I wasn't arguing against the possibility of atrocities (within the abstract discourse of "God-like AIs", which BTW feels contrived to me), just imagine how much redundancy can be spared while keeping much of the information content of humanity. I was arguing that there is more room for benevolence than recognized in the presentation -- benevolence from uncertainty of value. (Extending my "computation argument" from the "discounting" comment thread by Perplexed with an "information argument".)
A comment to http://singinst.org/blog/2010/10/27/presentation-by-joshua-foxcarl-shulman-at-ecap-2010-super-intelligence-does-not-imply-benevolence/: Given as in the naive reinforcement learning framework (and that can approximate some more complex notions of value) that the value is in the environment, you don't want to be too hasty with the environment lest you destroy a higher value you haven't yet discovered! So you especially wouldn't replace high complexity systems like humans with low entropy systems like computer chips, without first analyzing them.