Thread-creep again. But consider this situation, eric the red:
Aspiring talented newbie (never mind age) is considering whether to ask to sing/play later, while listening to God-awful floorsinger boring pants of all present. If he/she hears criticism at that stage, he/she (the newbie) may well stand down and not ask to take a turn (then or ever). What a loss, eh? And all for the sake of a few minutes of cringing...I'd rather suffer the God-awful, to give courage to the newbie.