Games Workshop is beyond silly in this point.
It is not GW that is being silly - it is the Warhammer fan community. This pre-emptive self-censorship is, alas, fairly common, but not warranted by any action GW has taken in the past. As far as I can establish, the (in)famous Cease and Desist letters from the past and other actions all addressed violations of the issues specifically covered by the GW guidelines regarding their
Intellectual Property Policy. You may notice, none of this concerns quoting individual stats, rules, etc. as part of a discussion, list building, etc. (which is covered by "fair use" anyway), but, for instance, there are regular violations on internet fora of these two points (not surprisingly things tackled by the C&D letters):
- Please don’t use images from our website, chunks of text lifted from our publications or any of our artwork.
- Don’t share unreleased material.
If the current thread is problematic, it seems to me more because of sloth and unnecessary posting than because of GW copyright.