The issue with super ignore is using it to the fullest extent has two problems. First, the "block threads started by user" slows down the page from loading considerably. Second, the "block posts quoting posts from posters you ignore" can eviscerate some threads when posters quote multiple others posters, one of whom you have on ignore, but you'd like to read the rest of that original person's post.
But then not using it keeps those posts around if they're quoted and then it can somewhat defeat the purpose.
Better than nothing, though.
You can just refresh the page to fix that.