The Potential Dangers of Web 2.0

This article, What's Next: The Idiocy of Crowds, highlights a couple of things that bothers me about how things are done today and the future of some of the Web 2.0 tools that are often discussed by the informal learning crowd.

1. Why are we so enamored by group think? The school systems particularly are big on arranging group projects where one or two kids do most of the work and the rest kind of kick back and do little or nothing.
2. Wikis seem to be a good idea for managing what has historically been seen as tribal knowledge that is lost when the person or persons who possess it leave. But how do you control the malicious employee who injects misinformation into the wiki content?

I guess it boils down to personal ethics.