OK, that makes sense to me. The more I think about it, the licenses and passwords are just ways to keep people from stealing something that they don't have a right to use.

Even though I can see what Mickey Mouse looks like, I can't make a t-shirt with his face on it and sell it. Even though I can see Adobe's source code, I can't use it without permission. Your copyleft note is very good as well, btw. I can see GNU source code, but there are still restrictions on use.

Thanks!