Allow the post author to decide the default sorting. I think this would be really nice because it would allow the author to design the appropriate dialgue.
For example, top sorting is good for finding the best answers. New is better to get a understanding of the general reception of the post.
It could also make sense to create new sorting methods if this was implemented. Perhaps a twitter like sorting where you can only see the first post in a thread. Then you can click into that thread.
Perhaps limit how users can interact for the post? Removing voting on comments or disable threads.