You know, I actually thought BVB learnt their lesson in naivety back in the Champions League, losing out to supposedly equal opposition. They lost me money on both legs of that knockout too. You go up against a giant who's down but recovering, you cover your bases, not go for an impossible kill. 4-0 at HT? Seriously, if the #2 in the league loses that badly, then Bayern probably deserve to win after all.
Less pissed about losing money on them than the scoreline. But okay, they're young. Need to learn their lessons.