One of the issues I'm having at the moment is the censorship with "flag" on discussions relating to political correctness.
This was taken out of front page: https://news.ycombinator.com/item?id=9747095
See "has political correctness gone too far" on my username: https://news.ycombinator.com/submitted?id=anon3_
These were extremely trending topics with relevance, it's just the people behind codes of conduct are able to get away with it by flagging criticism as "off topic".