"getting up on stage anyway".   I have to say I disagree. When somebody gets on stage for the first time, that person is bound to be nervous. (In fact that never goes away completely, not matter how many times you perform--it's just less).   So the performance is probably not going to be as good as it was at home.   I think anybody who wants to perform--and has memorized what he or she is doing-- should be supported.    If they are reading it off a sheet, my support goes down dramatically.   Sure it would be nice if everybody in a singaround carried off a song without a hitch.   But that's not a reasonable requirement.

As far as I'm concerned, more power to the beginners.