I would prefer to acknowledge and transform any evil tendency into a non-evil tendency by whatever means possible. That would be safe and healing.
The band Slipknot and other bands like it are not interested in changing. They have very obscene and hostile things to say towards the idea of changing / people who try to change them.
I have watched two interviews with this band about a decade ago. In one a member of the band explained one of the core beliefs of his group. That being: there are two types of people, goats and sheep. Sheep are followers and goats make their own decisions. Fair enough. But I think they are of the belief that goats are the ones they identify with, the ones who like the lyrics about killing people, people being inferior, not giving a crap about the inferior people, etc. and the sheep are the inferior people, the ones who do not fit into their agenda as artists.
The other one shocked the hell out of me. One of the members of the band said something to the effect of "Someone is going to die on this tour. If one of us doesn't die, we're going to take a victim."
Sensationalism. Perhaps. But there is a fan base that eats that stuff up. I have heard people talk about how cool the movie Natural Born Killers is. I have seen the cover with the reviewer saying it is possibly the best movie made in the 90s.
Fiction, yes. Also influential.
I saw a book while I was in Barnes and Noble the other night, it was in the philosophy section. The title was something to do with sociopaths. It said 1 out of 25 people do not have a conscience. They have absolutely no remorse and given the opportunity will cross any line to get what they want out of life.
That kind of scared me.
Now I see about 3 main types of people out there, although each person is unique and clumping them together is kind of silly. The ones who choose virtue, the ones who think they choose virtue but choose evil, and the ones who wallow in some sort of gray zone without making doing any serious delving and developing in the areas of values and purpose.
I think the majority of these musicians and famous people we see probably fit into the second one. And they do not want to live their lives differently. They like the evil that they think is good. They are rather attached to it. Maybe someday they will have some sort of epiphany and change, but I do not see much of a history of that sort of thing happening.
Now if someone in my community came to me and said, "Friend, I am sick with evil thoughts" I would take that very seriously and help them in any way I can. Like I said, I doubt these people are like that. They will continue to have negative opinions of those who do not fit their mold of how a person should be, continue to condemn them, and continue to say very shocking (to me) things about them.