Ask HN: How long has Google been censoring YouTube comments critical of China?
I don't know about China in particular, but I find youtube censorship to be particularly deceitful.If you make a comment, and it is censored for some reason, perhaps the video owner blocked you or whatever,  the comment still shows; TO YOU.  When you are logged in, you can see your comment.But no-one else can see it.Log out, or logon as someone else, and your comment is simply not there.I found a similar thing with facebook.  If you join a group, and are then banned for some reason (I'm not sure the exact mechanism), you can no longer see the group - it's as though it doesn't exist; it doesn't show in searches, etc.  But log out, or logon as someone else, and there it is.This 'customized view of reality' seems to me much more dangerous than simple censorship.