I hear you Lee. Generally speaking, more bad than good tends to happen when one takes direct exception and makes a huge fuss over someone copying ideas, code or style. I've seen many people react in a spectrum of ways, and even though they're fully entitled to feelings of outrage for plagiarism et al a big portion of the animosity and general ill will tends to taint and stick to the victim. I am not saying it's fair. Hardly. The solution is not to let bastards skate free, no, but objective community members with no vested interest should call foul when they see it. Unfortunately it does not happen near the frequency it should. But that could improve, and quickly, because one action begets another. In your case the best approach would be to merely identify the blatant idea lift sans any attitude and then let others supply the criticism. Tongues will wag given the slightest in.
tl;dr: Peer support, how the good [expletive du jour] does it really work?
PS: Do I need to add "this is just my opinion"? Squirrel.