Stanford prison experiment mastermind whose work explores the psychology of cruelty:

[defacto7]

9. Flawed as a controlled experiment, yes. A fraud has not been shown.

Zimbardo's own words, "So it doesn't fit the standards of what it means to be "an experiment." It's a very powerful demonstration of a psychological phenomenon, and it has had relevance."

There is relevance in this psychological phenomenon that is historic and is found in the experience of many. It deserves proper study but we can't dismiss human flaws because an experiment was flawed. I don't get the impression you're going there though.