If anyone were to write anything about me (lol who'd write about me?) I'd think it was odd. It'd really depend on the content. Like if someone were to do anything sexual, then I'd be pretty creeped out.
If I was in his place, I probably wouldn't read it...
Or maybe I would, I don't know. I'm obviously not a rock star. I'd probably feel a little creeped out at first, but... y'know, fan fiction writers aren't harming anyone. If Ryan Ross sits at a computer all day and reads the million fan fictions about him, maybe it's fair to say he's a little self-obsessed...
And also, it's fiction. He could read a book where the main character has an abusive father and it's quite a similar thing once you get used to fans using you as a character in their stories.