I doubt any website is blacklisted at all. Web-scale systems behave in weird and unexpected ways. That's it.
[1] For those who missed that silly 'scandal': The content creators that earned their living from making videos on YouTube were somehow unaware that the view counts displayed by that website were not strictly consistent. Because of that they ended up accusing a Wall Street Journal reporter (who was writing a story that happened to threaten their income) of falsifying some screenshots and videos.