Sorry, don't have time to read the extensive discussion. Just wanted to add another "NO" vote. Not only do I fail to see benefits, I see very real harms in allowing people to rate pages. The obvious application is pseudoscientists using the tool to discredit science articles. There are many unpopular truths in this world.
I have no idea what your current methodology is to quality-control the pages, but with only a few exceptions, it appears to be working. I suggest putting your resources into refining the existing methodology.