If you continually reply to the same user in the conversation, over and over, is that emblematic of good discourse? Is that an enjoyable conversation for everyone to read and maybe learn something from?
Maybe change the name of the bbs system from Discourse to Limited Statements? 
But, seriously, I don’t think it’s such a bad idea to remind people that after a while it’s a good idea to take the conversation into a new thread or personal messages when it turns into a tit-for-tat that no one else frankly cares about.
