And when they don't disable comments, they use the controlled-opposition tactics Sony used for the Ghostbusters trailer by deleting all the piercing, thoughtful criticisms and leaving just the one-liners so they could say "see?  People just didn't like it because they're misogynist fat-shaming haters, nothing whatsoever to do with the quality of our video!" This is also true of the comments Reddit mods like to delete or lock threads for.