I think we should define "Dark Arts" and "unethical" before we start labeling things as such. We've never really discussed what the term even means, and I don't think it's a good idea to start assuming that things are Dark Arts before we know what that means.

For instance, I'm not sure whether "make sure your partner thinks you are like them" should be classed as DA. Yes, it makes somebody more likely to accept your argument on non-rational grounds, but is it really more ethical to not seem like them, and thus take a non-rational penalty to your chances of having your argument believed?