Nonsense. Pick a different adjective, then. How could such artists possibly not think that their work is antisocial or abnormal or egregious or whatever?
This "urge" they're satisfying certainly doesn't develop in total isolation. In fact it's nothing w/out social context. PE is inherently social. Way more so than harsh noise. It can be all about hate or murder or the esoteric or misogyny or historical atrocity or misanthropy or whatever but it's absolutely social. Reflect on a serial killer or scream your guts out about immigrants, either way your are 100% entangled with society. If you look at the GO presentation in Osaka for example it's like a full on social or cultural or political phenomenon. Images. Uniforms. Weapons. Posturing. Vocals. Slogans. Iconic allies (GW&Prurient). An enthralled audience. It's social communication. Its tribal. It's social, even if it's "antisocial," and it would be ridiculous if someone, artist or audience, claimed this is not extremely different from convention.
I don't buy the bullshit idea "I didn't know &/or I don't care that others might consider this extreme, it's just what I think about." Of course you did, of course you do.