Back in 2011 or 2012 there were quite a few people being banned for using the autoblock cheat, chadz posted a list of them. I didn't even know about this "unblockable" cheat, and I very rarely play as a 2H on EU1 anyway, but it does explain why I have been obviously hit through blocks in Native and why on one or two occasions I've successfully defended even when I know I made a wrong block.
As I said, there is a "suite" of hacks available from a site somewhere which includes; autoblocking, clipping through walls, an aimbot, speed hack and zoom-out. I am also 99% sure there's another hack which uses the "allow bot headshots" code: if you play a lot of DTV you may notice bots always shoot you in the chest and then the game turns it into a headshot... I started to notice this happening in Native and the clincher was one day in a Deathmatch there was an archer topping the kills table with headshot after headshot after headshot. I took a 2H and ran at him, bending over like I would against a DTV bot and now this amazing archer put every shot over my head, just like a bot would. I killed him.