As we all know, what we hear on stage can be way off what the audience get. I like to get a bit of input from the punters as long as I trust their judgement. We have a few regulars who tell us if levels need adjusting. If you play pubs it's often the case that levels need changing as the place fills up as well, so what sounded fine in the soundcheck needs altering later on even though the sound on stage hasn't altered. I'm not precious about a bit of well intentioned input at all.