1) What are they supposed to do other than leave if you make it clear to them that you're not intrested in getting advice? Beg you to take it? They're already spending some of their own time on you while you're probably blowing up in their face or ignoring them alltogether - why should they stay?
2) How do you know it was "bad advice" in the first place if you dont know how to play said class?
3) The end of a dungeon is the best moment to give someone advice on how to improve on their class - it doesnt put a hold to the run, the people not affected by it can choose wether to leave or stay and it removes the risk of someone being so pissed off they'll just leave. Its also more relaxed once the last boss is dead.
4) Seriously? The best advice you've ever got was something this basic? That its easier to tank when in tank-stance and with a damagebuff up? Now I dont even want to imagine what you might have missed with your samurai...
