re: ah, calm down.....
There is no inevitability to most of what you mention; there is, in most cases, a choice. If DPI catches on with ISPs, there will be no choice.
> - Google has been collecting statisics on your browsing for years.
So don't use Google and block their cookies on 3rd party sites. Easy enough - certainly easier than moving ISPs
> - You drive down the freeway and a camera snaps you at 90 MPH and you get a letter in the mail with your fine.
The simple choice would be not to break the law. In any case I see a difference between law enforcement (although whether it's right is another matter) and exploitation for commercial gain.
> - Your bank sells your loan to another and they sell your info to bulk mailers.
No they don't. In the UK at least, you can opt ut from having your details passed on. I do, every time.
> - Safeway uses your "rewards card" to gather marketing statistics and people use the cards happily.
Again, choice. You don't require a card to enter the shop, so make the choice, pay cash and accept the loss of spurious benefits.
As to DPI companies operating in a way that "benefits everyone"; in none of the recent DPI examples has the customer benefitted - unless you accept targetted advertising to be a benefit, and there are many many people who don't accept that to be the case. The number rises rapidly when you explain it to the remainder.
Those in the industry are doing a marvellous job of convincing themselves that they're performing a really useful public service. The arguments look a lot less convincing when paraded outside the narcissistic goldfish bowl of the DPI/marketing industry.
One day I'm sure the marketing industry will be viewed in the same way as those who pimped 'miracle cures' a hundred years ago. As scum.