A little while ago, I was copying a page out of Mastering Oracle SQL to leave on someone's desk. I happened to know the topic, inline views, would get him particularly excited.
Someone wandered by and jokingly said you were cheating if you copied a book. In his mind, I presume, what I was doing was legally wrong, though not morally, and something to be winked at. Not so. "It's fair use," I explained, and commented that such small excerpts were completely legal. What a myth the copyright cartels have forced on us!
What a reassurance it was to think that Tim O'Reilly understands and respects fair use rights, and that if this really were a serious issue, he would back me up. Besides, copying that single page has a good chance of causing more purchases of the book.