China closes WeChat account in crackdown on anti-American fake news
scmp.com
scmp.com
I think this is an interesting case that makes a point - on one hand, it's now a general consensus that a large volume of fact-free, manipulative posts online are harmful and many argue that responsible platforms should not host (or at least not to promote) them, but the very same countermeasures that governments and platforms took against them can be abused to suppress legitimate speech and social movements.