So lets take this political correctness, thin edge of a wedge further. No songs about killing. No political songs. No songs unless sung by a person from country of origin.This should also preclude non Irish persons from singing Irish songs. No bawdy songs because they can upset and cause offence. In fact no song which demeans or portrays anyone as being less than equal.
As far as I am aware the blacking up of faces was in keeping with workers of the land who generally had little access to water and spent a lot of time in the sun.Also those who worked in pits and mines. Some, such as my father, had very darkened skin as a result of years of outside work. Morris dancers and Mummers have maintained a Traditional approach which represents our cultural past. Shame on you Tim. But then many of the wider issues we face today in our Society, can be traced to people who show no PC backbone.