When you are ready to bad mouth parents who are fully involved in their child's education and care enough to sacrifice in order to pay for it out of their own pockets, think about how they are making other children's education better because of the tax money they aren't using. Paula Bolyard has some valuable and often overlooked insight along those lines in What If All the Homeschoolers Suddenly Enrolled in Public School?: Who would foot the bill for all those kids?