Mt ignore list grows weekly due to this type of behavior. It immediately sucks any fun out of the run, I wish I could say when something goes wrong there is a helpful person or two that is patient and takes the time to explain what we should have done. Sadly that is such a minority these days, more often then not there is the group of raging idiots.
And yes, it is usually the highest dps or heals doing the yelling. Like we should thank them and bow down for carrying the group. Of course that isn't all chart toppers, but more often then not when the bitching begins They are in the top slot, or pretty near it. Why would someone with low dps/hps bitch and moan? It would be too easy to call them out.