On a related note, I'm terrified of typing his name into search or watching any of his videos because once yt thinks I'm interested in the "topic" I'll never be able to get rid of his face from my recommended videos or news suggestions. I have his channel blocked but I suspect that if you watch a blocked channel voluntarily they will treat it as an unblock.
The problem is the copycat and adjacent channels. You watch and block $BOZO, you now get suggestions for $BOZO reacts, $BOZO extras, $BOZO clips, and all of $BOZO's competitor channels.