I don’t know if there’s a clean way to do this right now, but I’d love to see a software project dedicated to doing this. Once a data set is poisoned it becomes very difficult to un-poison. The companies would probably implement some semi-effective but heavy-handed means of defending against it if it actually affected them, but I’m all for making them pay for that arms race.
Okay but irrelevant ads is the dream. I’d prefer not to get recommendations at all either. I’ll hear from word of mouth what’s worthwhile to watch, or I’ll look for it myself. Recommendations consistently muddy things up, it makes all modern social media useless, I have no idea how people can put up with it.