I have not noticed this type of option. It would be great for those who are trigger by themes that the author does not say before you read or even to those who wish not to see there stories by said author as a whole.
No that option doesn’t exist yet.
Actually, if you feel that an author misses to add tags that should be there, you can either add them yourself (any person can modify tags on any story by default, just below the story text) or inform me or any other admin. So we can fix this.
Hiding authors doesn’t seem to be the right way, I’d rather make sure that everybody uses appropriate text. You can always contact me by PM to tell me what bothers you specifically.