Copyright enforcement is a mixture of law and culturally-influenced practice. Although the statute law appears in black and white, the traditions and expectations of those who create and use GL are definitely greyscale. And the latter are a better predictor of both infringement and litigation than the letter of the law itself. Casual US assumptions about using GL stem in part from technicalities in the pre-1978 copyright law, which often threw GL immediately into the public domain. These assumptions stem also partly from the low economic valuation of GL, and the key role economic value plays in US copyright litigation. Since moral rights play almost no role in US copyright law, common European features such as the right of withdrawal have no place in local expectations. In recent years digital publishing and international access have exposed these assumptions to a context where the separation of moral and economic rights is taken for granted. Legal rights, both within the US and Europe, have also come in conflict with the urgent desire of both scholars and librarians to make grey documents more accessible by republishing them on the Web. Includes : Conference preprint, Pratt student commentary XA International