While I agree with you I personally can only put up with so much. I don't instant rage if it's someones first time and we wipe, but when I see things like tanks not comboing (like at all) Or using riot blade combo, or DPS not doing something correctly I give them tips to try and better it.
But a few times they ignore completely or just say something like "You're a tank not a dps/healer you don't know what your talking about." That is usually when I get heated then talk 'crap' I guess you can say or just completely ignore and hope we finish the run. But then again that's just me don't know if it bugs you as much as it does me lol.