It's not perjury, and they're not criminals. Perjury is making a false or misleading statement while under oath, and there is no oath here.
17 U.S.C. (512(c)(3)(A)(vi)):
A statement that the information in the notification is accurate, and under penalty of perjury, that the complaining party is authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.
But IANAL. So why isn't this perjury?