I feel your pain. One of the very last wreck games I ever worked involved an exchange with some freaking idiot arguing with me about whether he can have the block on a free throw (the league plays HS rules). He "kindly suggested" that I read the rule book. I came within a hair's breadth of telling him the only way to avoid the T I was about to give him was to correctly name the color of this year's rules book. But I didn't do it. At the end of the day, I wasn't the one there playing in the "C league" because he was trying to prove something.
BTW, what is it with rec league bozos and the block? It's not like it gives anybody that much of an advantage. But you'd think that it was life or death to some of them.