So I've been trying to ignore the dnd-5e tag, but on the homepage - and really on any question search page - it just grays out the questions rather than leaving them out entirely. Considering the sheer volume of these questions, it hardly makes the ignore useful at all. Is there a way to actually just not see these questions on the front page or in searches?
Yes, you can eliminate ignored tags from listings (including searches) entirely.
Ensure [dnd-5e] is on the list, then choose Hide questions in your ignored tags.
That's it. They will now no longer show up in search, the front page, the question list, etc.