> Whether an action is prejudicial is not a statistical question, but an ethical one.

I think this is kind of what we're talking about, though, isn't it? Does "prejudicial" mean "having preconceptions about a person based on a few observed characteristics"? Or does it mean "assuming things I think are unfair about a person"?

> My use of "immoral" here is to sign-post that something is missing: an ethical theory.

If that was the intent then it worked for me.