Do you have a moral obligation to share as an educator?

Recently I read an article by Wes Fryer and watched a couple of videos he had posted around this theme. The Internet has made sharing so easy to do--sometimes too easy because people have not learned what to share and what not to share. However, as educators, the point was made that sharing is an obligation. What does this do to the idea of creating lessons to sell? Are we really obligated to share freely what we could publish? The freedom of the Internet is a great tool for educators to find ideas and resources to help them teach a specific lesson. It also helps with the sharing of creativity at all ages. But a moral responsibility? I am still thinking about that one.

Here is the link if you want to check it out for yourself.