RJM You are not reading our posts carefully. We are all in awe of Bert's work and indeed we all sing songs fabricated by him and very happy to do so. Several of us here are performer-researchers. However, it is perfectly acceptable on this forum to mention and critique deception and/or bad scholarship.
Also, there is a world of difference between a revival/journalist silently fabricating songs, and a source singer writing new verses and altering songs.
You are obviously looking at the material through a performer's eyes. Being a researcher as well is a perfectly valid occupation, particularly on a forum like this. Don't be so precious!