Just like YouTube Disqus does massive shadow censorship. They also put you in Disqus jail (your comment might not show up for an hour or two or even 24 hrs as in my case). My comments are never published in real time. I would give Disqus 0 stars if I could.
Totally biased! They rejected my question because I described (in a very respectful manner) a negative experience with a doctor. I was asking for advice and they denied to help me!