I'd hypothesize that people are more willing to entertain the profiteering fantasy when they aren't realistically facing the consequences. Also, that people are more willing to be jerks under cloak of anonymity. As you note, perhaps only 1% of people with the drive to find these sploits are going to do something bad with them. That means the extra volume is folks who wish they had such a product to sell on the black market are just jealous wannabes. You can ignore them.