Grumblings Over Google's Updated Toolbar: Double opt-in anyone?

Dan Gillmore summarizes (or this) grumblings about the "autolink" feature in Google's tool bar beta edition:

At the very least, Google needs to make some changes in the installation process. As users install the toolbar they should be asked if they want features that change content on web pages. There should be an opt-in process, not an opt-out process, for such things.

This makes no sense to me. The choice to install Google's Toolbar is itself an opt-in process. Is Dan seriously advocting double opt-in?