| Composer | Title | Date | Location | Details |
| Giuseppe Verdi | Aida | December 10, 2006 | Milan | When tenor Roberto Alagna's opening aria "Celeste Aida" was booed by the loggionisti in the opera house's less expensive seats, he walked off stage while the music was still playing. Understudy Antonello Palombi, in a black dress shirt and slacks, came on a few seconds later to replace him. Alagna did not return to the production. |
| Steve Reich | Piano Phase | February 29, 2016 | Cologne | During a performance of the piece by Iranian harpsichordist Mahan Esfahani in the Kölner Philharmonie, parts of the crowd clapped, whistled, and walked out. Esfahani, as he introduced the piece in English, had been ordered by a heckler to speak in German. Loud arguments between numerous members of the crowd persisted for several minutes; Esfahani stopped his performance and started playing a concerto by C. P. E. Bach instead. He attributed the 'pandemonium' to the choice of a modern composition, while the German media inferred a xenophobic motive. |
| Giacomo Puccini | Tosca | January 4, 2023 | Barcelona | The controversy primarily stemmed from the unconventional staging of the opera at the Gran Teatre del Liceu. The production featured Mario Cavaradossi as an alter ego of Italian film director Pier Paolo Pasolini, who was murdered in 1975, trying to draw parallels between them as artists seen inconvenient to religious and political powers. Controversial scenes included many references to sexual violence and an invented scene of homosexual prostitution between Pasolini and his alleged killer while the song "Love in Portofino" played in the background. All this was met with substantial booing from the audience. |