Personally I feel anyone manipulating others with a lack of remorse while showing the other listed traits is a severe detriment to society. Grandiosity and self absorption can have other origins and also aren't inherently anti society in the way that manipulating and attacking others without remorse is. For reference I was severely attacked on twitch by an NPD streamer. I have familial ALS and am autistic and wanted to let people know about my condition and all the issues involved. This NPD/psychopathic actually made a fake channel about me, used video of my sleep disorder to make up some sex stuff about me, made up stuff about my family, history etc. They clipped audio from my videos to make audio clips of me saying things etc. Again, I'm terminally ill and autistic. That's the types of things these people do.