Have you reported the posts?
I can't speak for my cycle-mate, but I have reported BADecker's posts with all sorts of violations, including plagiarism. The only thing that is handled properly is multiposting, everything else is ignored.
If 10 or 20 members report these posts as plagiarism in the right way (with the source), then I don’t see how anyone could ignore it. That member cannot be above the rules, even though P&S is one of the boards that is obviously completely out of the focus of the administration.
See above. And I don't think any proper report from any member should be ignored.