Alagna may have just joined some stellar company.
There is a story that Franco Corelli went after somebody who was heckling him -- carrying the sword he was using on-stage.
And Enrico Caruso was booed in Naples, near his home, and never returned to sing there.
And Kathlleen Battle is hot, and sings beautifully. Too bad she's a PITA.
She's also a very boring performer. Her Zerlina is so lifeless. Pretty voice, but no character behind it.
Anyway, according to an Italian article the tenor said earlier that the audience wasn't passionate enough for him, so they had to prove him wrong. Also, according to Renee Fleming, getting booed at La Scala is like a rite of passage for singers.
At any rate, he shouldn't have walked off.