>>40230717Serious answer to embarrassing subject, I see it in two strands:
The true devotees think of the character. "If I liked this person in real life, would I wish that upon them?"
The rest realize these are pieces of commercial fiction that as fanatics they ultimately enjoy so much too much that they'll do as they damn well please. See how shippers (and fan artists in general) can take their properties of choice immensely personally with one breath and then inflict total suffering on their darlings from a safe distance the next.
Not that you need to be either of things to call awful shit awful.