A very few posters suggest, nay demand, that 'folk' should be the registered trademark of a homely kind of quasi-historical music or story telling and that it is necessarily more authentic and therefore somehow purer than other forms.

Where do you get this from and how does it relate to "GEFF".

As Nigel suggests, the disapproval surrounding acts like Rusby...

But what Nigel seemed to me to be suggesting was those that believe in "GEFF" were those that made negative comments about artists like KR, "hated" people doing music degrees, etc. and one followed the other.

The reality is some who do not agree at all with GEFF will make negative comments about certain artists, some that do go with GEFF will speak positively of or defend the same artists, etc.