When MtGox's trade delay hit 30 mins+ (April 2013), and the price was crashing, I hopped on to IRC. I went to mtgox's channel and advocated in the strongest terms that they halt trading, like any sane exchange would do (the trade delay was a major factor in the crash).

When Tux's #2 told me he couldn't do it because Mark was asleep (time zones! etc), it became pretty clear they didn't have a clue about what they were doing.