The Jaron Lanier quote may belong in a criticism or media references section, but the fact that he has made an unsubstantiated assertion in a book critical of the article's subject doesn't go far to proving that this is any sort of motto. If this was a citation to a place where members of the movement whose motto this purported to be were making this assertion, that'd be a better citation. If you found a PETA brochure that stated "'Killing animals is fun' is the unofficial motto of the meat-packing industry..." it'd be about as credible as Lanier's quote.