I've specifically written about this recently:
https://news.ycombinator.com/item?id=19485935
https://news.ycombinator.com/item?id=19403438
https://news.ycombinator.com/item?id=19404162
That last link is an example of how these accusations hurt the community and individuals.
Plenty more explanation here for anyone who wants it: https://hn.algolia.com/?sort=byDate&dateRange=all&type=comme....
That IP used to resolve to n-mnstci-142.mnstci.iraq.centcom.mil . In my spare time I add information to Wikipedia, then I am taxed and some propaganda minister in the military, being paid by my taxes, gets rid of what I said and does some Orwellian rewrite if history.
These Chinese efforts seem skin to what the US government has been doing.
More explanation and links in this post upthread: https://news.ycombinator.com/item?id=19538691.
I wonder if the 50 cent party https://en.m.wikipedia.org/wiki/50_Cent_Party is going to be involved in hacker news anytime soon...