I’m in a similar situation—I comment (sometimes) on reddit and HNews, and have occasionally posted a few sentences to OB, but I am much less likely to comment here. The high quality of the posts and comments leads me to agonize a bit overmuch about every part of a comment, and sometimes I will write, edit, and rewrite a comment before deciding to just not comment at all. I, too, often feel I would not be contributing anything original.
(I should also note in this comment that I am male.)
Do PUA techniques withstand the woman’s reflection? Once made aware, do they acknowledge the effectiveness and accurately reaffirm their interest independently of the technique’s effect? If incredulous, is her attention held after a demonstration on another woman?
If the answer is yes, that does a good deal in converting PUA from a (“dirty”) trick (like Fool’s Mate, in chess) into a valid strategy (like Sicilian defense). If you could demonstrate valid strategies, you’d get a lot more karma out of the effort.