"Morally justified" threads

[AstralFire]

In the most recent one in particular - I don't see much difference between krossbow's thread and a thread that says, "Tarquin's still a jerk even if you like him." There is no one specific action being pointed at here, just all of them, which... is what the character is built on. What's the dividing line? At what point does discussion of a character's likability become discussion of a character's moral justification, especially when the comic's subject matter itself is often about morality?

Do we just avoid talking about it at all, ever?