Google lawyers urged Koh on Thursday to dispense with multi-district litigation that accuses the company of mining personal data from emails without users' consent, violating the federal Electronic Communications Privacy Act and a handful of state privacy laws.

Google lawyer Whitty Somvichian of Cooley insisted the company automatically processes emails as part of its "ordinary business practices," which are exempted activities under federal and state wiretap laws. Advertisements are an integral part of the Gmail service, he explained.