There's another great thing about kink and warning tags; being able to search for them specifically! In that vein, I say the more the merrier on the tags. For the people who don't want to list kinks or content for lit reasons, you might try offering a special tag that says that "This piece may contain content ordinarily tagged or warned for," so that people can go into fics with their eyes open.
no subject
Anyway, that's my lurkish input.