Yesterday I was catching up with the posts on the Perl Beginners mailing list that's run by the nice folks over at learn.perl.org.
Someone posted a question asking about which books would be good to learn Perl from. Amongst all the responses pointing people at various good (and less good) Perl books, someone posted a link to a site that has copies of many of the O'Reilly Perl books available for download. I assume they were pirated from the CD Bookshelf.
I posted a response, removing the link from my post and pointing out that it was probably a bad idea to advertise such a site on a mailing list where a number of the authors of those books would see the link. Maybe I should have been more direct and said that stealing from someone is bad enough, but telling them that you're stealing from them is just plain stupid.
Within an hour of me posting this, I got a private email from someone saying that my post had been corrupted and the link has been removed from it. They asked if I could sent them the link because they couldn't afford to buy all the books they needed.
I said no