Side note: I'm generally amused by these types of threads/polls.
Considering that for most message boards, digitial piracy is a forbidden topic, I can't imagine that anyone that has done it and has a modicum of active brain cells is going to openly admit to such in a public forum.
Places like the #chan sites you'll see "Anonymous" openly talking about such a thing, but that's only becuase they're "Anonymous," and thus generally acking in accountability. See also Gabe's "Greater Internet Dickwad" theory.
On topic,
I bought the 4e books. Considered buying the PDFs, but given how little I play 4e these days, that's money better spent elsewhere on things I do use.