This suggestion is made with regularity, for example this was last time.
Viewing post in Tags and Genres: Selecting for exclusion
Ah, my apologies--I checked the first page and some of the threads, if I recall correctly, but perhaps didn't search assiduously enough.
[edit] Given that, is there a thread for common suggestions? I don't see one, but I'm tired enough right now that I may have missed it. If not, then such a thing might be useful to have.
This has been suggested regularly (and is the most upvoted issue on Github), but has there been any word on if/when it might be implemented?