I must admit that common sense cant be thrown out the window but take this into consideration:

Newbie has just got his wings and is putting together his 2nd plane by himself and has nothing more than the "official" instruction manual that has all this info and legal info in it. He starts and does EXACTLY as the manual sais and is not privy to avance techniques such as reinforcement etc. He puts it together and goes out to have a failure as described in this thread. Who is at fault? The only place where I know where user input is officially required are in "short kits" offered out there and no where else. Like the post above if you make any alterations to the plane you voided your warranty etc so I ask again..who is at fault?

Yet again its the manufacturer/retailer.