I agree, but for the next two years this will be ILLEGAL for me. It's not that it's just not allowed, it's that I will be fined more than 7500 USD, and that's a risk I won't be taking. There's no advanced CSS in the 'header', it's just about margins, centering and stuff like that :-)
I can't prevent people from selling my work to other people, but with the amount of people on these forums that sell configs, it won't be difficult for me to prove that someone is selling my work. When I sell configs, I keep records of the people (address, email address, name and company) that buy my work. When people want me to do a custom config for them, I give them all the rights. They can sell it and do with it as they please :-)