Cap'n - can't think of a gentle way to say this but your continually harping on about a long defunct policy of a long defunct folk club is getting very tiresome! Even your bete-noir, Ewan MacColl, has been dead for 17 years now - there's no chance of him telling you what you can or cannot sing. And even when he was alive this policy only applied to the Singer's Club and I don't remember any requirement to attend that club if you didn't agree with the policy.
Please, for God's sake, get over it!