I think it raises an interesting point
My experience of the folk scene was one of people saying what they thought about your songs and singing and being able to reciprocate
Nowadays terms like 'folk police' and 'purist' seems to have done away with all that nonsense
We used top have a saying in Liverpool, "Don't stick your bum out of the window if you don't want people to throw stones at it"
The same can be applied to singing in public, If you don't want other people's opinions and ideas, stay at home and sing to your rubber duck in the bath.
Jim Carroll