I think the copyright applies to the page contents but not the downloads as it would be quite strange to reserve the copyright for files that haven't been created by GCW itself (or rather its representatives). And, actually, except for a few cracks,
none of the files on GCW belong to GCW (staff) so, by definition, nothing can be stolen from here.
The copyright remains at the authors, as it should be, and he or she should be the one to send a "fuck you" to people/companies expropriating their stuff - but even for publishing their stuff without due credits. But, if it means anything, I also say "fuck you" to them.
I think the main problem is that, in theory,
anyone could create mini images from games so those "thiefs" could have made one by themselves, too, but they had to use someone else's which is sooo lame and unprofessional...