I would really like to see this as a feature. Furaffinity added it and it's actually really nice and I'm surprised it wasn't already implemented on here. Basically, it would work by clicking a button next to a tag and it would add the tag to your blacklist without you ever having to navigate to your settings page every time you come across a new tag you don't want to see. Perhaps even giving a little pop-up box asking if you want to customize the blacklist entry (for things like "tag -tag").