To be honest, I do not believe that is what this experiment demonstrates. For all we know his has been viewed and treated as �a bit of fun� with no real stern belief that real long lasting harm (or prolonged torture) is being inflicted on the �actor�. Most people would probably even see some humour in the short sharp shocks being inflicted. TV shows have shown us this, such as Jackass and the like. Some people do it as a past time and get sexual kicks out of it. So I don�t think it is as clear cut as it pretends to be.
If you put the same people in a room and said, flick the switch and watch the man in the chair be executed, you would probably find less than 3 out of 10 willing to do so. Similarly, if the original �victim� was trussed up and humiliated or degraded and was pleading for their life. Although, to be fair, these are Americans so the willing participants might be slightly higher.