It's not about being entirely anonymous. It's about not having individual pieces of data being trivially linked together and pointing at you. That is, it's ab

It's not about being entirely anonymous. It's about not having individual pieces of data being trivially linked together and pointing at you. That is, it's about avoiding a situation where a yelp review can be trivially linked to your identity from which your home address, work address, children's school, and probably a bunch of purchases or service activity from some website that got (or gets) hacked. EDIT: And it's the future-tense "gets hacked" that ought to be particularly concerning. Considering government contractors and online services leak user data left and right, anything they know will eventually become tantamount to publicly accessible. Managing ones footprint (e.g. putting their toll device in a cage) is a mitigation against not only what is currently happening to that data, but what may happen and what it can be cross-referenced.