Everyone look! I’m being trolled. But I guess I’m falling for it, since I’m responding.
Ok, these federal cases hold that copying music for personal use is illegal:
Sony BMG Music Entm’t v. Tenenbaum, 672 F. Supp. 2d 217 (D. Mass. 2009)
Metro-Goldwyn-Mayer Studios Inc. v. Grokster, Ltd., 545 U.S. 913, 920, 125 S. Ct. 2764, 2771, 162 L. Ed. 2d 781 (2005) (Supreme Court of the United States finding potential vicarious liability for file sharing service based on users downloading copyrighted songs.
And plenty of other authorities.