There's a youtuber who breaks down samples in songs by hip hop artists, and he gets striked or all his earnings taken by someone who stalks his videos, he used to cut samples to below 15 seconds, and still gets striked. You can't even defend yourself, and arguably he is within FAIR USE of the content.
Someone, somewhere is going out of their way to strike their videos. It's ridiculous, do they strike news channels when copyrighted music plays in the background without their control too?
Yes, they do. In Brazil, to avoid some news reports about stores selling contraband items, the store owners started playing Disney songs in the background, meaning they weren't able to publish the videos or broadcast them.
What is being discussed would be more like if a court tried to get Google to take down individual spam bot youtube accounts that had popped up that same morning. Its rediculous because the legal system doesn't move that fast (nor does DNS), so things that require that level of heavy-handedness are typically much slower processes taking months or years.