Aston.
And, as for Milgram's study, many of the participants were having nervous breakdowns and begging to be allowed to leave, to which the response was, 'the experiment requires you to continue'. A small percentage refused to do so and walked out. The confederate was crying out in pain, moaning and eventually stopped making any noise at all after shocks that would be lethal were administered. The experiment was repeated several times, in several different locations with different authority figures with similar results. In the studies where the percentage of participants that went to the highest voltage were lower, the perceived authority of the experimenter was also lower, i.e shabbily dressed or the location of the experiment was not as prestigious. They were aware of what they were being asked to do, and did so anyway due to adherence to authority.
To dismiss this study completely based on criticisms of ecological validity is absolutely ridiculous.