Yes I'm using some POLISURBAN mapblocks... in different terrains and with different tilesets, and modified RMPs. Like Nord said, how many walls, exactly, have to be changed to satisfy Hobbes?
But to be more serious: Meridian is exactly right in his private opinion. I have removed most of the stuff Hobbes asked me to not because he had any legal or moral right to demand it (after making it all public domain several years prior - hell as Meridian points out, he COULD NOT claim them as his own because they use copyrighted assets), but because I choose to do so to avoid escalating the conflict (and frankly, because a person who behaves like him doesn't deserve to have his legacy propagated, preserved and cherished by other modders and their players). Someone could even think it was all bait-and-switch - make maps, have modders use and improve them, and years later claim them back as your own and forbid use. I don't think so, but I do think it's harassment.
Hobbes himself, before this issue came about and we had normal relations, bragged to me about "stealing" my ideas and putting them in his Battletech mods. Is idea and lore any more or less original work as map or texture?