I had experienced this on one of the discussion sites. The only difference is that the moderator deleted the new discussion that earned so many comments. Is that fair? I find it unreasonable. I attempted to ask why it was deleted. They just ignore me. One of the users told me that once the question was being answered, the moderator will delete it. Where is the essence of having a site that the platform is for discussing something? I sometimes cannot understand why moderators do this. Is it because they have the power to do it?