We're getting into a problem here in that we are confusing venues, and to a large extent responses to such circumstances may well be dictated by venue. A concert hall is not a folk club, and in a performance which combines singing with storytelling or other more-or-less scripted oral presentations --especially comedic presentations, requires much more structure and concentration (both audience and artist) than do some other performances; flow and timing can be extremely important aspects of a successful performance. Under the circumstances, Davey's concern was justified, even if his action was extreme and ill-advised. Mick's suggestion seems to me to be the most sensible.