What exactly is the purpose of this?
Are you trying to prevent people from copying the text content? What's to prevent them from simply reading it and typing it out again?
Are you trying to prevent people from copying your markup and styles? So what if they do? Frankly most of what I learned about HTML and CSS was from looking at other sites' markup source. Just as artists learn from other artists and musicians learn from other musicians and writers learn from other writers.
Even if someone doesn't copy/paste directly there is nothing preventing them from creating a design that looks exactly the same. Then what? At the heart of your question is not a technical concern but rather a legal copyright concern.
Keep in mind you are writing to an open source community mailing list. I encourage you to investigate http://creativecommons.org/licenses/ for help in licensing your content.
Carl Wiedemann Website design & development consulting carl.wiedemann@gmail.com | skype: c4rlww