You eagerly start reading a discussion supposedly about a subject of great interest to you, only to find that instead of being about the named subject, the discussion is full of posts arguing about how to discuss, what posts should be allowed on the forum, the attributes of a particular poster, complaints about others' posts and complaints about the discussion. Your heart sinks. You search in vain for any on-topic posts, then give up and never bother returning to that forum or discussion again. That is meta-discussion, and it ruins many a good discussion. For that reason, more and more discussion forum owners are asking posters to avoid meta-discussion. This article explains why.