There are actually two kinds of parodies; one is when the mick is being extracted out of the song itself, the classic here being Billy Connolly's take on D.I.V.O.R.C.E. There is a really funny one on "Willy McBride" (by Crawford Howard?).

The other is just using the song as a vehicle for satirising something else. Les Barker generally uses this type - "Nolans and Elton John" (Lowlands Away).

Sometimes they make a bit of light relief from the 42 verse Child Ballads. They have been there as long as I can remember since the days of performers like Miles Wootton.

The Folk World is a very broad church, but there are still those who would like to impose excommunication on others who do things that they don't approve of.