Having looked through this thread, and the thread "Offensive lyrics- edit?" the one thing that becomes obvious is that while the songs I have mentioned are "folk songs" leaning towards the "Traditional" that are performed - The Baptist/Darkies Sunday School cannot be similarly described, or put up as a candidate for serious thought. In a thread below the line Jim Carroll once provided the lyrics of an extremely offensive and racist song by way of an illustrative example. The maximum audience that this song was ever performed to was 46 and in that particular group it was a case of the songwriter preaching to the choir. Doesn't matter how offensive the lyrics of a song are, if the song is never sung, there is simply no exposure of the material for it to do any harm. I have never heard the Baptist/Darkies Sunday School performed or sang by anyone at any sing around, singer's session, folk club, concert or festival - no exposure, no oxygen to give it any traction - and just to make it abundantly clear I would never ever consider learning that particular song let alone perform it.