I think one reason that crowd sourcing works as well as it does on the web is because there is an actual crowd. What this article is referring to is more like "

I think one reason that crowd sourcing works as well as it does on the web is because there is an actual crowd. What this article is referring to is more like "small group sourcing". The benefit of the crowd is that there are generally enough people to counter act false alarms, prejudices, etc (not always, but generally). The proposed system would have only a few people one which to draw information rather than the hundreds, thousands or millions that these kinds of operations usually are deployed towards. Basing information on just a handful of people exposes many flaws that are generally evened out over actual crowds of people.