Well, it somewhat seems a front. I went to that one festival and saw him play live, and he never really seemed to be such an angry pissed off black metal front man. He really seemed kind of nice and that he loved to interact with his fans.
Oh, one kind of off thing that he did is that while he was in the middle of his set some guy in the front handed him a cigarette and pretty much told him that he wanted him to put it out on his forearm. So, Kvarfoth gladly did, and the guy quickly jumped at first he and even though I couldn't hear what they were saying he pretty much was like "No, you asked for this and I got your fucking arm man, you're not going anywhere." Then the guy was like "fuck yeah" after a few seconds.