Perhaps the point I made could have been clearer.

It is perfectly possible to discuss questions relating to prejudice against Travellers without disclosing private information relating to the family of one person who was acting as an informant to a song collector.

Doing this strikes me as unprofessional in the extreme. It seems particularly inappropriate when the person making the disclosure has, in another context, complained at length over a number of posts about somebody's favourite meal being discussed on the grounds that this was a personal matter.

And responding to this is not a question of rising to a person's bait. Moreover, if people on this thread do not see that this is a real and important ethical issue, leave alone on relating to song collectors in general getting the trust of communities they deal with, then as far as I am concerned, they are the ones who need to think again, rather than engaging in knee-jerk defences of the culprit.