Well we also have the fairusenoalternative and fairusereplace tags which would be good to get using... Also, all the boiler plate justification tags should have a "fair use in" field. We should require a seperate justification for each instance of use, then use a robot to detect extra links. Half is probably correct but still pretty ambitious, as there remain 133,767 fair use tagged images.... and that isn't even considering the additional 100k (my estimation based on random sampling) mistagged as something not fair use. I've gotten about 19,000  deleted so far, but just that small amount has caught me so much flak...