But isn't that part of the fun when someone is ignoring one for no reason? To still get to mark his work (with a big, red X if it's wrong, as it very likely is, else why would he have ignored one in the first place - however - little did he know, he can run, but he can't hide! Ha, ha, ha, ha, ha! *maniacal laughter*)
Sometimes, it can even tempt him into un-ignoring one, and then one can begin again to explain to the Ignorant One the error of his ways.