This is something that's really started to be irritating to me here and on some other forums that I visit. While I've seen it in the past it seems to be getting out of hand (see the 9/11 and global warming threads) people are arguing or discussing something and all of the sudden you start seeing MASSIVE cut and paste documents! One person post a 1000 word essay (or more) by a claimed expert supporting their side then the other does the same. Back and forth and back and forth surely no one is reading all that bullshit! So why post it!?
It's like English class! How well would you have done on your thesis work if you had copied verbatim giant stretches of the source material? Post a short summery of the person's support for your argument or the point they are bringing up then post a link to that website! Short quotes ok summaries ok. Cutting and pasting the entire book... Less ok!