Practically, this is available on google books. It lacks the metadata, but google is good at searching.
Ethically, it is reprehensible to imply that Aaron Swartz was intent on piracy. (Does anyone have evidence that he was? ETA: He seems to have endorsed "guerrilla open access" in 2008; and his work on PACER is similar, though more clear-cut than this torrent. But he has used also datasets otherwise.)
Legally, it is clear-cut: digitizing a book creates a new document under copyright. Google and Gutenberg distribute these documents for free, but only for noncommercial use. ETA: this is not true about Gutenberg; it is not clear about Google.
Incidentally, the Royal Society has its own archive; this is not from JSTOR. ETA: no, this is from JSTOR.
Legally, it is clear-cut: digitizing a book creates a new document under copyright.
What do you base this on? There is a comment on Hacker News stating the opposite.
http://thepiratebay.org/torrent/6554331/Papers_from_Philosophical_Transactions_of_the_Royal_Society__fro
Greg Maxwell is torrenting 33Gib of public domain JSTOR documents that were behind paywalls.
What's your take on this, ethically, legally, etc?
ETA: More on this: http://gigaom.com/2011/07/21/pirate-bay-jstor/