It's irrelevant, full stop, Jack!

No dancer nowadays needs to disguise himself/herself for any sort of anonimity issue. (As a morris dancer myself I'm avoiding making the usual wisecrack here).

The cheapness of blacking materials is no longer relevant. Most use greasepaint nowadays anyway.

Continuing any activity solely because 'it is traditional' is ridiculous in the extreme. For any tradition to survive in the modern world it needs to be adaptable. Christ, even religious leaders are beginning to realise this! Okay, well some of them.