When you think about it, walls in this game don't even make SENSE. When creatures attack in this game, they are charging forth to strike at you, and you throw other creatures in their way to block. Makes sense, right? This is why flying creatures can't be blocked by most ground creatures - they can't be intercepted.
Why the fuck are my creatures always running into immobile walls? "Oh shit, how do I get past this small barrier of crap piled up?":
http://www.collectorscache.com/StoreModules/ProductImages/132/wall_of_junk.jpg
Some walls span a long range, but then that makes one wonder: why can't all of those walls block as much as they want? They aren't moving, so how can I choose what they block and what they don't block?
Why do my creatures attack the wall? Why not just climb over it? Does my legendary vampire really punch the brick and go "Next time, wall, next time!"?