But isn't there a prescribed way, under the law, to make the putative content owner pay a penalty for falsely claiming ownership? Isn't there a business opportunity there? And the "service" that reports "violations" ... don't they have a responsibility to their customers not to expose them to liability like this? I.e. they should be indemnifying their customers and paying the penalties themselves.
Maybe an injunction is in order, until these "services" can develop some scruples.