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My biggest concern is that it will get too random and low quality. 

The worst that can happen is something similar to SO's failed "Documentation project" a couple of years ago, where users were to write documentation and examples of misc programming-related topics. These ended up in a separate place at the site - a category if you will. There was no clear structure for how to organize these articles - anyone could write one, edit one etc. You could provide feedback to specific articles. What happened was this:

- It was rather unclear and subjective what problem "Documentation" was supposed to solve in the first place. (Wikipedia 2?)
- Documentation pages ended up all over the place, broad and arbitrary. It was impossible to search through it looking for a specific topic.
- Everyone and their mother felt the urge to write these posts, meaning that the overall quality ended up very low. The domain experts who wrote good articles had them drown in floods of crap.
- Duplicates and overlapping topics happened frequently, with no easy way to resolve them.

And then there was actually a peer review system in place + you could leave comments etc, but it wasn't nearly enough. The whole project collapsed under the weight of crappy, chaotic articles.

Something similar to SO Documentation must be avoided. Then the question is - how do you do that, on an open Q&A site where everyone is (and should be) allowed to post, regardless of knowledge level. And how do you provide structure and guidelines for what the papers must look like, how they are categorized and so on.