I have had "veteran" members with great i-trader feedback back out or not pay up. I have given out neutrals to a few people and one person I let it pass because he is such a well respected member. I go into group breaks now expecting one or two to drop out so I plan accordingly and try to get as many back ups as possible.
Nobody is making me do them, so I figure it's on me to run it as smoothly as I can.
What bugs me most is when people have time limits on draft breaks and they don't pick or communicate at all about what they would want. If nothing else, all I would want is a quick pm stating "hey, I don't care about this break since I got a bad slot. Autopick me what you want." That is the reason I'm going to lay off the draft breaks and stick with either random hit breaks or team breaks.
Itís not what happens to you, but how you react to it that matters.