I've never played Warhammer computer games (I only played the tabletop once at a friends house), and if the company behind it thinks it's ok to be big huge raging dicks like this, I really don't care to. I can't believe any company goes after fansites. These are the people who buy your products and promote its continued existence. These are the people who offer you up honest feedback for improvement and try to get others involved. This isn't a homoerotic incestuous Mario Bro's fan fiction website, they aren't defaming the franchise in any way.
As mentioned in the article, how are these websites supposed to maintain themselves? They could ask for community donations, but honestly, how many people would pay to support a fan website? Hosting and registration aren't free (sites this big can't use Geocities, if it was even still around). Companies like GW should be supporting these websites (they wouldn't need ads if GW picked up the tab). That, of course, might not make the community so open, being sponsored by the company, but at least it would show support for the community, rather than spitting in their face.
That brings me completely off topic. "Web 2.0" has completely killed free hosts. Why bother to signup for geocities or tripod (and have to learn the super-complex language that is HTML), when you can sign up for facebook or myspace or blogger? Bah, what is the internet coming to these days?