Online collaborative tools !

Now. Everything is collaborative.
How do wikipedia convince people to help them update their entries ?
Why would such a system thrive in an environment where a groupuscule of people could be so harmful ? Wikiscan will bring some ethics, and I think that therefore businesses will have their modifications done by someone else instead of doing it themselves.
I started a private Wiki on zoho.com.
Now I'm perfectly convinced that online collaborative tools should become the norm.
As often said, alone, we are weak like straws, together we are strong like a mighty faggot.