If someone one your ignore list dumbs you (so you don’t get the notification), do you really notice it? I do end up seeing the “dumbs” if someone else responds to my message but I don’t really notice. If they make a way where it doesn’t show up at all, great, but I think the current website does a good job of helping you tune out the people on ignore.
In terms of the dumb button in general, I do use it quite a bit, but would be fine with it going away. At the same time, is it that much more negative than saying you dislike someone’s post, that they’re naive, or that they’re a tool (dislike, optimistic, and useful respectively)?