Contact every parent of a diocesan high school student who objects himself, or whose child has objected, to the efforts to restore doctrinal integrity to the schools.
Then ask them to reimburse the Faithful of the Archdiocese for the portion of the actual costs of their childrens' schooling over and above the tuition the parents paid -- for every year the child has been in a parochial or diocesan school.
They obviously didn't actually want to raise their children in the Faith, and in fact, even if they were non-Catholic and upfront about it, seem to object to other students being raised in the Faith by dint of teaching and example.
Yet they certainly knew that that was the goal of the Archdiocese, as well as the intention of most of the non-parent pewsitters who every year contribute to other peoples' childrens' school costs.
They have committed fraud.