I support the motion.
Any scientific publication requires the authors to present the data that enabled the conclusions.
Unlike gene sequences, for instance, the coordinates are by no means the data of a structure solution, they are the conclusion. If the structure is above suspicion, then there is little to be lost from making the structure factors available. Moreover, I do not see what additional information could be contained in them that makes them so important to withhold. But they do enable others to calculate density which, in the end, gives more information than the B-factors alone. So I think that, on publication at the very latest, the coordinates and structure factors should be made available.