Canary - // I seem to remember that way back in the early Sixties screaming audiences occurred - IIRC it was when a group called The Beatles were performing :-D //
That may appear to be the same thing, but it's not.
The noise that accompanied The Beatles and made other sixties bands' performances was uniform screaming from start to finish, more or less the equivalent of white noise.
Modern audiences, and its shows like X Factor that are to blame, developed a habbit of sitting quietly for periods of a performance, and then whooing and screeching if, for instance, the artist(s) sang a higher note, or sang a little louder, or there was a key change.
Or, as in the case of Attraction, who are performing something no-one has seen before - as soon as a different visual image appears.
Even though they have no clue about the merits or otherwise of what they are watching, they whoop on clue like Pavlov's Dogs, it's dreadful, and sadly it's now with us to stay.