most users won’t realise the box is there

It was a hidden, opt-out feature.

But thanks for your denigrating comment. We now know the value of your thoughts.

You should perhaps watch this: “Taking Control of Your Personal Data” by prof. Jennifer Golbeck, published by The Teaching Company, ISBN:978-1629978390, likely available at your local library as a DVD or streaming.

I suspect you don’t realize the extent of the tracking occurring today.