Can already toggle by opening up a second browser that you never use (and you clear cookies and history after each use). You'll still get geographic filtering b

Can already toggle by opening up a second browser that you never use (and you clear cookies and history after each use). You'll still get geographic filtering but little else. Webmasters do this all the time when checking out how well individual pages rank for various keywords. Of course, your idea of a visible toggle switch is far more user friendly. EDIT: added "history"