Is it so hard to publish at arxiv, share the paper on twitter, and submit a link to HN? At a minimum, arxiv is better than a blog post because there's some sense of versioning.
For anyone who is curious, some conferences share the peer review comments (even though they do not share the identities of author or commenter). Here are the comments from iclr2017 (https://openreview.net/group?id=ICLR.cc/2017/conference) and here are comments on Ian Goodfellow's GAN paper by Jürgen Schmidhuber and others (https://media.nips.cc/nipsbooks/nipspapers/paper_files/nips2...).