I think it's more of the fact that they are throwing their legal weight around again against the "small" guy that has got people wound up ? 
It's partly that for me. There is no need for them to do it and it aggravates me that they can do something like that with no recourse for the victim to defend themselves. The system is seriously flawed in that way. All that has probably happened is that the GW legal team has an intern and a search engine and every time "space marine" crops up they fire off a Cease and Desist type email without actually checking on if it really infringes on their products. It's lazy and bullying, something I abhor. And it begins a process of ring fencing a trademark. And you can do it with everything if you have the initiative. Perhaps to bring it a little closer to home for Inso, what if they decide they were the first people to put a dwarf race in space? It would be very difficult to make stick in court I would suspect
if money could be brought to bear in the defence of other space dwarf manufacturers. But can HF afford to go to court over it? And if they can't then they've lost. Something to think about.
All that's really needed to stop this bullying is to make it necessary to
prove infringement before a cease and desist letter can be sent. That would cost money and make it less likely that small, frivolous cases and this lazy ring fencing could take place.