Reminds me of the controversy over Paul Robeson singing the lullaby Ma Curly-Headed Baby, and the multitude of versions of the song that, usually ludicrously, remove the "racist" allusions. Audiences of traditional songs are intelligent human beings on the whole and should either hear the unexpurgated original or not hear it at all if the artist isn't comfortable with it. There's always the option of a light-hearted health warning in the pre-song banter, skilfully done.