This is weird, I remember seeing discussion on along these lines that wasn't ever flagged. It sounds like you're speaking from experience, do you have an example of something you posted maybe?
I don’t think getting downvoted for spamming inflammatory political opinions on HN is the damning evidence of censorship conspiracy you think it is. Do you have examples of this? Did this happen anywhere besides HN?
You may want to question your own objectivity on this subject.
It was overwhelmingly clear.