Those things would surely be illegal, and perhaps that is in the evidence somewhere and just didn't make the summary.
Pretty much. It could be that the statements that mentioned copyright violations of something like 'download MP3s of commercial artists!' were more abstract and obfuscated enough to not make a good headline.
Also, balance of evidence. A number of emails along the lines of 'find MP3s of music that the owners WANT to share for free' might of saved their asses. Modern copyright law is automatic, the creator of the work owns the copyright automatically and has to explicitly allow sharing. Ergo statements about 'downloading all the music you can find in order to add it to the sharing' can be assumed to be hitting copyrighted works, because, well, they'd actually need to contact the content owners to get permission outside of relatively few works.
For example, even MP3s of classical music are copyrighted. Sure, the musical score Bach or Beethoven wrote is free of copyright. But the symphony that produced the performance? That's not copyrighted, and the ability to record high fidelity music is so new that all of the 'good' recordings are modern enough to be protected.