Or you might pretend to be good, and push on us in nefarious ways we wouldn't even notice so that we end up saying things like "Go Eliezer".
How would you tell the difference between him pretending to be good and being good, whatever you mean by good? (This is the basic question of rationality.)
in principle, you can't.
A rational evil would pretend to be good until it didn't matter anymore
Original at Washington Examiner
http://washingtonexaminer.com/down-with-politics/article/2508882#.UGSscI0iYZm
Repost at Reason.com
http://reason.com/archive/2012/09/25/why-politics-are-bad-for-us