"If California law is applied, the Illinois policy of protecting its citizens' privacy interests in their biometric data, especially in the context of dealing with 'major national corporations' like Facebook, would be written out of existence," Donato wrote in his ruling. "Illinois will suffer a complete negation of its biometric privacy protections for its citizens if California law is applied. In contrast, California law and policy will suffer little, if anything at all, if BIPA is applied."