An anecdote from Jimmy Wales founder of Wikipedia,has sparked an interesting debate - read more at http://edu.blogs.com/edublogs/2007/12/knives-and-rest.html .

I particularly liked this comment on the blog... 

"There are too many people out there who would take any potentially harmful (though extremely useful) tool away from our students. I urge people to think about the number of teen driving accidents, and ask themselves why, under the same logic, we wouldn't look to abolish automobiles."