If you imagine all that was said in Yogscast's perspective, you can try to make an understanding. Notch gave them their own panel. They thought Notch had established them as important with that act. They thought passively that they had pre-established liberties in that. When they were treated the way they were, they got mad because they thought they had been mislead.
Really, both sides are at fault. It sounds like Yogscast was almost completely uninformed. Like they only arranged them to come there and talk. They didn't know schedules, they didn't know they were only a small part of the event, and they found it unpleasant that they found out by force. Then they are at fault for having such a strong negative reaction to this, causing so many problems.