David Warlick has posted on this subject. His thoughts may make an interesting addition to the pot. The question of ethics comes up quite often in our class discussions, and we often conclude that a purely ethical approach would be paralysing to the future of research. At what point do the ends sufficiently justify the means to press ahead with research even though people may be negatively affected or given and unfair advantage as a consequence? Where do ethics end and political correctness begin? Lots of questions. Fewer answers.