This.  Either everyone should be notified before the first google analytics transmission so that they can choose to opt in our out.  Or the default should be off and maybe on new installs they can choose to opt in.  At the opt in&#x2F;out dialog (when you give the users a choice) you can make the default to opt-in, but having the default as opt-in without any input from the user is bad form.  It is similar to spammers calling your e-mail address &quot;double opt-in&quot; because they got you to open an e-mail and you didn&#x27;t click the unsubscribe link.