If he's actually cutting himself, there's more than just theatrical distance involved. Theatricality would only entail that he pretend to cut himself; the fact that he actually does it points to a pathological reason for doing so. It might not be a symptom of a suicidal disposition, however; it could just be one of the ways he immerses himself in the physicality of the live experience.
No that's GG Allin,hopefully that Sapur guy can match him in the foul deeds department!