This sort of thing has been in full force in the US for nearly the past 8 years; organized downvote brigades have attacked entertainers that have voiced criticisms against right-wing opinions or politicians. For example, Quentin Tarantino is under massive attack for comments on the police iduring the BLM movements. His latest movie was downvoted massively (Hateful Eight) even before it came out. Even his older movies have been under attack. J. K. Rowling, the author of the Harry Potter series is under similar attack for her comments against Trump and Brexit, and her positions on Twitter. Her latest movie (Fantastic Beasts) have attracted a string of -ve reviewers. Amy Schumer attracts an unbelievable level of vitriol due to her anti-Trump comments. The list goes on.
The strategy is discussed and coordinated on right-wing Talk Radio and alt-right websites.