Once they have the data its over. You cant un-collect data in this day and age. There is no assurance that it isn't retained and sold, legally or illegally. I don't care about changing settings. If its a default setting, it is too late to opt out, they already have done it.

We need a digital bill of rights. We need a digital bill of rights. We need a goddamn digital bill of rights for our modern age that was inconceivable when the constitution was written.