I'm not sure if this is a feature or a bug, but I thought I'd throw it out there... If you have the Internet Project, then any techs you get for free can be traded to other civs even if you're playing with the "No Technology Brokering" option. IMO, these shouldn't be allowed to be traded, because you didn't research them yourself. However, it may be a feature, to allow the Internet to have additional power. I'm just wondering if this has already been discussed.