Salon has a good article this morning about a debate within the American Psychological Association about the ethics of Psychologists participating in interrogation sessions. Before reading the article, I hadn't really thought about the problems in that one, though of course it all seems obvious in retrospect.
Psychologists have the means, one would assume, to break prisoners down more quickly and efficiently. And with less physical means that don't leave visible scars. (For contrast, both the American Psychiatric Association and the American Medical Association have some out with strong statements against, well, hurting people.)
Thinking over this one, my instinct is to say "Gee, psychologists should have to swear to 'first do no harm' like doctors do."
But I always try to check myself when I am tempted to say "Gee, SOMEBODY should MAKE those people stop doing that." And indeed, the issue may be more complicated than I'm seeing. Surely the marketing firms for fast food companies and tobacco companies hire psychologists to convince people to consume things that may be harmful. That's basically bad, but I am hesitant to want to legislate against it. (Naturally, the legislation would be within the APA anyway.)