Agreed about berating the bad players, but on all the big online sites, any player dealt into the hand (cash or tourney) can easily see an opponent's mucked showdown hand.
After they bring up the hand history. It's not displayed at the table.
The client will now never post the BB out of position; it will always wait for the BB to come around before auto-posting.
In the future, of course, you'll be able to select whether you want to auto-post blinds and also whether you want to post OOP. But for now, this seemed like the most sensible choice.
