To the other point about this information not being appropriate for the purposes Albright mentioned: Isn't this exactly the information that a health insurance company wants to know for outreach? If I know that all the pregnant women in Tuscon are signing up but none from Pheonix, I suddenly know where to put my next billboard or field office.
If this was a private sector company, nobody would be surprised at collecting this data. It would also be a different story if the data was being stored and analyzed in house or even if the doubleclick request happened on the server side instead of the client.
I agree with the general sentiment that this is a privacy violation, but that's because of the way that the data is collected and who processes it, not the collection and use of the data generally.