I don't think this helps. The problem isn't that the wiki is clogged with low-quality content (unless you count spam), the problem is that content doesn't make its way to the wiki. Making it harder to add real content is a step in the wrong direction.
How can we incentivize more productive activity on the LW wiki? There are many articles that could be created or expanded.
Are there previous discussions on this?
One suggestion: We could add a "good explanation!" button at the bottom of each article, and every time it is clicked, the user account responsible for the plurality of words in the current draft of the article gets 10 karma points. This requires that LW and LW-wiki accounts be synced, first.
How can this suggestion be improved?
What other suggestions do people have?