Let's make this a bit more accurate. Consider a world where your box of donuts WILL have donuts taken out of it, even if the box is closed, as soon as you walk

Let's make this a bit more accurate. Consider a world where your box of donuts WILL have donuts taken out of it, even if the box is closed, as soon as you walk away from the donut shop. As soon as you hit just about any website on the internet today, YOU WILL BE TRACKED. There's no maybe here, it's a virtual certainty. So this makes it accurate in your analogy. In this world (call it Doughnet?), it makes sense to have the donut shop print a sign on the box in the event that the sign is sufficient to prevent people from ambushing you and taking your donuts. You could simply ask the donut shop to give you a blank box if you wish to have your donuts taken (opt-in donut sharing) rather than asking them to give you a box with the sign (opt-out donut sharing). Nobody expects to have their privacy maliciously and constantly invaded. This is emphatically WRONG behavior. And so broadcasting to all parties that the user of your browser is willing to be tracked by default is precisely the wrong thing to do. I don't care what your motivations are, it's just wrong, period.