I think that every of us are right in a certain way.
I understand that people should be flattered because someone is copying his work (surely it happens because the ... um... copier (?) thinks it is very good material), but I don´t want people using my material wthout my knowledge and most of all, without saying who did write it...
Some teachers asked me that if there were a way to avoid copying, because they don´t want to see their web material printed in a book and sold with another one´s name in it. (that´s the real reason of my original question)
The world is moving in another way now. MIT´s example (and a lot of other ones) tell us so. Hollywood Movies are being copied all around the world, and nobody can´t do anything about it. I love MIT initiative, because there´s my only way to get to that material. Open Source is not only the future, but it is our today already, and the nombers are growing by the second.
The thing is... some people don´t get used to it yet.
Anyway, the HTML protection it is a good idea too, but as you´ve already said... there´s always a way to copy any material. The only thing that we can do about it, is try and make it more difficult...
Sorry about my terrible english (an awful spanglish...)
Buenos Aires - Argentina