A federal court of appeals on the 10th circuit, in deciding if Russel Greer was correct to sue kiwifarms, a website, for copyright infringement, has declared that posting DMCA takedown notices counts as contributory infringement after the fact. Somehow. It's all in the Greer lolsuit thread. It's part of a supremely retarded decision by the court that also holds websites liable for content they don't host, but more importantly, contradicts decades of prior, settled case law, which is why null is appealing to the supreme court.