Squidwarts just makes me giggle, but for sundry odd and not terribly interesting reasons I am very, very hard to shock or squick, and things that would tend to disturb most folks just leave me inappropriately amused (and filed away mentally to whip out at some point in the future when I want to make someone else's brain explode.)

(I am reluctant to mention my candidate for "scariest" here, in part because that judgement is based not on any observed delusional fan behavior but rather because this is one of the few times I've actually found a fic that deep-down squicked me to the core; and in part because I don't think I could even explain just how disturbing that fic was in a non-scarring fashion. About all I can say to keep this vague is that, while I have seen/read equally or more disturbing acts in horror films, or guro manga, or badfic, in those settings that sort of thing tends to come across to my jaded, near-unshockable eye as mostly ludicrous. But in this case the story was actually well-written, and while it was fairly extreme, the characters involved were so fucked-up in canon that this was a strangely believable final act to an already deeply-disturbing canon, which is why those images are now BURNED ON MY BRAIN and it will never, ever be clean again.)