I feel like "bad faith" is now a thought-terminating cliche. As long as people can suggest someone is acting in "bad faith" (maybe doing a "Gish Gallop", a "false equivalence" or even just "motivated reasoning") then they can instantly ignore everything they've said.
The purpose of logical fallacies (as a topic to learn about) isn't so we can just shout out "FALLACY" whenever we think we see one, it's so it's easier to find a tool to refute them (if they are indeed fallacies).
See https://en.wikipedia.org/wiki/Thought-terminating_clich%C3%A...