Although in this case I think it is simply someone who has mental problems
Even though I wouldn't mind seeing people like that banned as this isn't the place to showcase your mental problems, I kinda appreciate the fact that Bitcointalk freedom of speech, even if the speech is bullshit. Just click Ignore, that's what I did a long time ago.
If you reply to trolling posts, you are feeding it and make trolleys more exciting and have motivation to continue trolling.
That will never end. By the time someone gives up and stops responding, someone else jumps in and responds to his posts again. Even with the best intentions, some users can't be helped.