No. Next topic.

With regard to Brian's scenario..... I think I would treat this situation the same as an uncalled bet, meaning when someone still has a hand and there's been a bet to them and they neither called, nor stopped any action by the dealer prior to another street being produced and action continued.
Player B is already angling and is going to be penalized. Penalize him further by forfeiture of the pot for angling, inducing action, and forfeiting the right to act by not stopping the dealer. Then have a chat with the dealer.
I see the scenario going down something like this:
TD to Player B: Why'd you turn your hand over?
Player B answers - and if it's anything other than, "I thought we were all-in" (which in this case we know it's not), then....
TD to Player B: So you're angling.
TD to Player A: Why'd you turn your hand over?
Player A answers - and if it's anything other than, "I thought we were all-in" (which in this case we know it's not), then.....
TD to Player A - At what point did you think he was folding or thought he had a dead hand?
TD awards pot to Player A and puts both players on a penalty for exposing cards with action pending.

Alternatively I have witnessed a TD allow Player B to call, pull the river card back, reshuffle the card back into the stub and continue the action with both players KNOWING EACH OTHERS HOLE CARDS. I can't see that as a reasonable solution.
Push the pot, no one is damaged other than Player B, who was angling.