Yelling back at a famous musician who is doing a masterclass could have terrible consequences. If he's very influential and nasty, he could make your life very hard as a musician. Isn't it probably why almost nobody do it ? You don't want Andras Schiff as an enemy.
I think it can goes very far - you can be bothered for MUCH less in any conservatory, for instance, where there's always some politics involved. So, "insulting" the great X could be seen as a kind of suicide. But I think it's the right thing to do - it depends on what are your goals as a music student I guess.
Je ne crois pas, pas du tout! I really don't think so.
If a student doesn't "yell back" when a teacher is simply being nasty, it's because he has no spine. Too bad for him.
Salut les Franche-Comtois!
Well, from what I've been told, even just not pleasing someone, having studied in an "enemy" school, having a better level, etc. can be quite handicaping.
Some persons are just very influential. And I can only guess how Schiff's influence is like. And on the top of Schiff, there's the whole room looking at you, and you might well get a "bad" reputation for doing somethingof this kind.
Althrough I've not experienced it (in the bad way), I think this is really how it works. Peer pressure, reputation, relations, power, etc. are all things that can influence your studies and your carreer. And I bet a lot of students are willing to play the game - by lack of courage or by what they think of as intelligence, or both.
Just being seen in a masterclass might be worth it for them.
I personally just wouldn't attend a masterclass with a sh*tty teacher even if he's a world-class musician (:
Salut l'Andorran !