Woohoo!!
What a great thread. From pianos to opera et all.
I'm not seriously suggest that amplification be banned but I think that real acoustic performance is becoming an endangered species.
It is obvious that there is a limit on how large an audience can enjoy listening to a performance "sans yamaha".
Albert Hall or Carnegie...no problem...I'd give it a go!
Wembley Stadium? No probably not....
From my own experience as an audience member I have had heard many more performances spoiled by excessive amplification than by lack of decibels.
It is much easier to shush idiots in the audience than to influence a power crazed insensitive new age sound person.