After having had my two children with autism, I have begun to understand a LOT about people and their behaviors. It is true that for normal people (I mean people who have developed typically) there are some who need background noise, like the radio, to concentrate. Then there are some who need complete silence to be able to study, such as me. The performer, in this case, needed the silence of the audience to be able to perform. The audience to whom he was performing were incapable of containing their outbursts (a sort of tourette's syndrome offshoot).
It is easy for me to see why the performer acted as he did, as he probably lacked the understanding of how utterly compulsive and uncontrollable those outbursts are. Ironically, it is typical for a person with such a disability to have outbursts when excited, such as enjoying the live music.
I like Art's analogy, when you have lemons, make lemonade. I wouldn't have done what Davey did, but only because of my own understanding. I wonder what I'd have done before all this came to light for me?