It might have been clearer if I'd distinguished between advice that is bad because it suggests unwise courses of action, and advice that is bad because attempting to follow it is not a feasible way to modify your actions for the better. I think it's bad advice of the sort that doesn't provide enough information to be positive or negative.
Clarisse Thorn recently posted a useful article about Ethical Pick-Up Artistry, bringing up a few basic critiques of traditional PUA and suggesting a few alternatives.
A proposal to formalize thisNot the same thing, but a discussion on forming a community to practice social artistry in general has been brought up on LW before, but I'm not personally aware of anything coming out of that.