::::But.. Wikipedia is wisdom of the crowd. See this aricle: 
For Kendall Whitehouse, senior director of information technology at Wharton, the most interesting question is "whether the wisdom of the crowd is ultimately a better approach compared to scholarly review and edited content." As Whitehouse observes, "Wikipedia's strength is that it has thousands of eyes looking at it. The hope is that errors will be quickly caught and corrected.".. Marketing professor Peter Fader notes that Wikipedia shows there is wisdom in crowds, but a better user rating system would filter out those who post bogus information. Joel Waldfogel, professor of business and public policy, agrees that much of the concern about Wikipedia is just a new spin on whether old media (printed encyclopedias, in this case) stand a chance against the new breed of instantly updatable online media. (quoted from article). In short, no matter what system you come up with here, it is going to be wisdom of the crowd, by design, that is what Wiki is. So you might as well design a system around that concept, go with the natural design of the system, work with it to all its advantages, not work against it and try to limit it with "old media" concepts.