For the uninitiated, generally NSFW is for sexual contents and NSFL is for gory contents. People may want to see one but not see the other at any time for any reason. I have seen this feature requested over the years in Reddit but it never happens. Maybe now some instance can finally implement it?
This is a good idea, anyone who thinks otherwise hasn’t stumbled upon a guy getting his head chopped off when they didn’t want to see it.