I've done disliking. But they return every time I search for something related that I do like.
Example: I like to get nostalgic and watch old movies on youtube, but when I do that, videos of the Nostalgia Critic show up in my recommendations list because it's related to the thing I searched. But I don't like his stuff, because all he ever does is mock the films in their entire being and make horrible jokes about them, rather than actually giving them a proper review. I know some people like what he does, but I can't stand it.
Blocking sounds kind of far-fetched, doesn't it? But maybe it will help.