Burl Ives was a "friendly" withess during the blacklist years. He was considered an outcast by the folk establishment.
Years later, at a Weavers reunion concert, a very old and very sick Burl Ives appeared on stage and Pete Seeger, who had been hurt by Ives' testamony, embraced him.
I wrote, at the time, that Pete did an admirable thing but I kind of wished he had used him as a urinal, first.