This looks to be a very good example of the dangers of a little bit of rationality, or a little bit of intelligence. The layout encourages deploying Fully General Counter Arguments. There appears to be no mechanism to ensure the information on which the arguments are based is either good, or agreed upon.
I recently found out about arguman. It's an online tool to dissect arguments and structure agreement and refutation.
It seems like something that's been discussed about in LW some times in the past.