It might also be noteworthy that when I think about people I strongly dislike, I like thinking about the borrow-wight's song/incantation.
Anyway, I don't really find INTJ's that intimidating. I find them sort of blunt (in kind of an amusing/weird way, actually), and occasionally odd in their behavior, but that's really it. I've noticed more than a few other people find them intimidating, though. More often, they just seem very confused and frustrated by people not understanding them or their interests, and also seem to be occasionally oblivious to other people's reactions to them.