I'm not quite sure where I said my goal was complete anonymity. Just not willing to over-divulge.
You sound like you are trying to justify something to yourself because something I said unnerved you. I'm not stupid. I know that specific things I do triggers tracking, but I am not as willing to yield more information just because I have provided other information to other companies. That's like saying that just because a donut is bad for me that I might as well go try heroine. Google has proven themselves far more capable at analyzing and making sense of "Big Data" than grocery stores and the like. Anybody can collect data, few can make sense of it. Facebook has proven themselves very adept at relaxing their privacy policy and surprising their users in a bad way. So far Apple has been very good with my personal data and I have grown to trust them. My credit card is a necessary evil and they do unfortunately sell information to target mailers at me for products. I don't mind letting Google know some of my interests so I get appropriate ads and offers, but I don't want to be auto-promoting products on Google+ (a new change that G+ users have to opt out of).
It's the tinfoil hat mindset from posters like yourself that drive me nuts. Google isn't sitting there reading all your emails trying to find things against you; they are using cookies to track your web activity, and thus, target ads more effectively. Personally, this never bothered me. It doesn't bother me when Facebook does it (mostly because I have my privacy settings to my liking), it doesn't bother me when iAds does it, and it doesn't bother me when Google does it.
Targeted advertising isn't a real evil.