Most of his usernames are characters from harem animes. It's like looking for a pedophile in a haystack of pedophiles.
Madness string 92601
But people don't get large facial scars in a vaccuum. It's very likely that something awful and traumatic happened to them which caused the scar. The events leading up to my scarring were over fifteen years ago and I can still confidently say its the worst thing that's happened to me in my life.