In my own opinion....
I would never have done what Davey did.
That is my choice. Everyone has to make their own. This is not to say I might not have been irratated, or that I wouldn't have been pissed that my performance was thrown off.
Performers have to remember, if they are going to do live shows, that audiences are PEOPLE. This means that there will be a certain percentage of rude, or innattentive, or loud, or obnoxious, or sleeping, or totally oblivious ...etc. BUT...without an audience...you wouldn't be there.
I have heard many performers interupted by OR drowned out by cheers and applause. Never heard any complaints about it. But if it had been someone booing, or yelling for popcorn?