If a bad player sits down, hits busting hands against dealers stiffs, splits 10's, and makes every bad play in the book will it hurt the other players at the table. The answer is No, the cards are still random and a bad player will help just as much as he hurts.

Try as I might, I have friends who will never stop whining that some player was stupid and took the dealers bust card.

I ask them how many times the player also took the card that would have made the dealers hand, and caused the dealer to bust.

Exactly what you said. They only remember when it's a loser, not when they win.

I think there's something to do with blame for losses and winning expectations in this, but it's too early in the morning.