Notice how they covered up the original markings. They pay people to steal content under the guise of 'we are not responsible for our users uploads'.
Its one thing to copy content, but to remove the makers marks and then use it to make your site more 'popular' , then thats not nice. There are sites that scrape content from forums. Then make the threads into question and answer format and change the posters names and a 3 day old site has millions of bits of instant content.