Aslan, please re-read CPs opening post.
A player made a stupid play and did indeed cause the table to lose vasts amounts of money. This is an undeniable fact. Had he played the hand right the table would have won and the dealer would have busted.
You can say that bad plays by ploppies help as often as they hurt. I hear that here constantly yet I've never seen any proof given for such statements. I know without a doubt such bad plays have personally cost me tens of thousands of dollars in just the last few months.
Even if it were true that the # bad plays by ploppies help as often as they hurt, I believe they still cost APs money. Let's look at the most common ploppy error; taking a hit that could bust their hand against a dealer stiff. In negative counts when you have a minimum bet out, such an ill advised hit has a better chance of taking a small card away from the dealer, or taking away a small card I need to make my double down. Conversely, in a high count such a bad play has a better chance of taking a 10 away from the dealer or a ten I need to make my double down. I know, there's a lot of tens still left and no one knows how the cards are going to be ordered, but in such a scenario every unnecessary hit that draws a ten away from making your hand or from busting the dealer is going hurt more than it's going to help. So even if the actual number of such hits helps as often as it hurts (which I also dispute) it's going to cost me (and all other AP) money because I'm going to lose more big bets. Not to mention they're also eating up more cards which could result in fewer rounds when we should have an advantage.
So would you rather play at a table full of first time ploppies or a table where everyone at least plays good Basic Strategy? I'll take the BS players every time, unless the ploppy table is full of hot coeds and I can play teacher.
And I see absolutely no reason not to at least try to correct a player who makes such a bad play. That doesn't mean you have to come get in his face and come to blows, but at least try to show the player why it was a bad play and how it cost everyone at the table money. Then hopefully it won't happen again.