Taking these companies at their word, what’s there to worry about? We trade privacy for convenience all the time. We visit sites that keep far less detailed records of our comings and goings with “cookies” — the small placeholder text files they drop on our hard drives. Millions of people subject themselves to more intensive scrutiny when they use Google’s Gmail service, which scans the text of each message to place more relevant ads.
If deep packet inspection lives up to its promises, it might even yield a cash benefit. Internet providers using this technology could afford to offer customers a deal: Accept this scrutiny, and we’ll knock $10 a month off your bill.
But systems such as deep packet inspection unnerve a lot of Internet users for sound reasons.