I take it Wikileaks won't be using this as their DNS provider.
They have lots of places on the internet to talk about politics. If you want to do so, I bet you'll have no problem finding an appropriate place.
This, however, is not that place.
Past that scale (probably 1000 individual threads or so; rarely seen on Reddit, and never on HN), a secondary voting mechanism purely to sort threads by "on-topic-ness" might be required, or perhas an automatic sort on how similar in word usage the comments are to their parent, to derive some crude sense of topicality.