Just like how you can block people, you should be able to hide a topic from the mainpage(on your screen). It’s like a personal unlisting, so you are never notified of that topic being updated ever again.
Reason why: JTNs Doodle Thread has a pretty funny picture in it that I never want to see again. Also, when some topics start to derail, you might not want to be reminded of what caused that derailing.