More importantly, this is echoed in the other works/experiments. Cut Piece explicitly instructs the audience to cut away pieces of her clothing. The "Sex Raft" was intended to initiate conflict in order to find a resolution but ended out just showing that everyone got along until the "experimenter" deliberately intervened. The Stanford experiment, as said before, explicitly set the "wardens" and "prisoners" up as enemies and instructed them to act hostile to each other.
It seems that the only cases of violence in these "experiments" turn out to be violence performed under explicit instruction. Also note that Milgram's experiment not only has the instructor explicitly insist on an order being carried out but it also removes the subject of the harm by only providing a voice channel whereas the instructor is present in the room with the participant. And a number of participants eventually refused to comply nevertheless.
It seems that the only cases of violence in these "experiments" turn out to be violence performed under explicit instruction. Also note that Milgram's experiment not only has the instructor explicitly insist on an order being carried out but it also removes the subject of the harm by only providing a voice channel whereas the instructor is present in the room with the participant. And a number of participants eventually refused to comply nevertheless.