My point is that private companies are perfectly within their rights to track you on their own property, whether by computer or manually, and if you have a problem with it your only recourse is to avoid those companies. I have zero problem with a supermarket using my presence to improve the layout of their store, and to be honest, zero problem with Google tracking my phone's presence there to produce those useful 'when is this location busy' bar charts on their search results - it's helpful to me, and others, and free!