Berating people at the table, to me, is bad because it wakes people up to their poor play and it gets them to thinking about better positions. If a guy is going to chase a four outer and hit it on you for a somewhat large pot he'll be tempted to do it again and odds are he's going to be folding on the river pot committed with his king high when you have aces up. If you berate him he might not fish for straights because of your comments.