I count myself fortunate that I've never been a fan of Games Workshop's products, because it appears to have saved me from a lot of grief.
GW has long had a reputation for being, let's say, ornery in its dealings with many folks, including online and brick retailers, but this latest offensive against everyone and anyone posting any material remotely related to their products seems very ill-advised.
I noticed some moths ago that GW was taking a hard line against eBay sellers who attempted to use images of GW products in their ads. Now they've acted against fan sites and Boardgame Geek file posters.
It makes no sense to me to be rude to your biggest fans -- they can always spend their time and dollars elsewhere.
The last time I remember a Big Boy in the hobby acting this badly was TSR and we can see where they are today ... .