One limitation in Open Graph that it accepts only real-world objects like: Movie, Author, News and Band. I would like to use with more non-real-world objects like a post, question or a comment.
There is one entity that might fit in such use which is the Article, but using it for both a post (e.g. blog post) and it's comments would be a little inappropriate.
However there is another not very real-world type which is News I though that this might fit in such use case: Blog Post as Article and it's comments as News, would this be ugly?