Even when you receive a notice from Google that a subpoena seeks the disclosure of your information, or identity, you still have choices. The same is true of a court order. You can ask that Google “quash” the subpoena — which means that the subpoena is overly broad or seeks information irrelevant to the underlying lawsuit. In the case of a court order, it can be stayed pending an appeal. Needless to say, if you don’t care about your information being disclosed, you can do nothing. But if the subpoena seeks to unmask you so as to name you in a copyright infringement lawsuit, or otherwise, doing nothing may not be wise. A fair use other other defense may conclusively establish that the lawsuit is a sham.
Rather than using Google — or even social media outlets like Facebook — with your eyes closed, it is probably better to know what you are getting yourself into. Otherwise, you may be unpleasantly surprised one day when you find out what you thought was private isn’t.