Read up on the details the case where Google was "circumventing privacy controls in browsers". All Google was doing was trying to the the status for the +1 button on the page. A bug in Safari was piling on the extra cookies, which Google ignored.
Or, let's tape on our tin foil hats and look at it from YOUR perspective:
There were a relatively tiny number of people who actually enabled DNT in Safari. And those were people who were not likely to click on ads anyway. But, according to you, the people at Google made an active decision to that this was a market worth pursuing. So, knowing full well that privacy advocate would quickly discover that Safari was still tracking Google users, the decision was made to exploit a bug in Safari that piled on cookies to an outgoing connection.
I mean, come on, this is Google, some of the top web experts on the planet. If they knew about this Safari bug, and decided to exploit it, then they also would have known that the exploit would be discovered almost immediately and have to be removed. So you are asking us to believe that Google decided to engage in a huge PR fiasco just so that they could get a months worth of tracking info on a handful of people who were unlikely to click on ads anyway?
Is that what you want us to believe? Better add another layer of tin foil.