I think you can already both ban nsfw and hide users that you don't want to see... but I am not really sure. If not I guess it will be a feature in the future. But I wouldn't call voluntarily avoiding things for censorship.
No matter what none of these things will not work 100% sureproof for you. If people does not tag themselves you could be exposed to bad, bad things anyway - you need a protocol and a surveillance -staff to prevent such things.