I have no objection to ads. It's the tracking I object to. I see no reason that the web can't make money with simple ads the way that it has always been done in newspapers, radio and TV. You place ads based on the content being presented, not on a clandestine tracking of every individual viewer.

Tracking defeats the two advantages to society of advertising. One is the ability to view content with anonymity while still allowing the content providers to make money. This is especially important for political editorials, medical information and such things. The other is to expose people to things they wouldn't have searched out for themselves. Tracking indicates what you have done in the past and only suggests a continuation of that pattern.

If we let this go on the web, the analogous thing is going to end up happening in the real world. Other media, like television, radio, newspapers and even billboards can't compete unless they start to track who is watching, reading, etc. Corporations are going to be using video surveillance and facial recognition to track you wherever you go and send you advertising accordingly. Billboards will record your license plate number as you pass. There will be a brisk business buying and selling all this information.