Further than this, the corporations that are tracking us actively would like you tell you they don't care about DNT, and they've no obligation to respect any DNT user[2]: "The DAA does not require companies to honor DNT signals fixed by the browser manufacturers and set by them in browsers. Specifically, it is not a DAA Principle or in any way a requirement under the DAA Program to honor a DNT signal that is automatically set in IE10 or any other browser." This is point blank saying that DNT may as well be used as another way for you to be tracked, from one of the biggest places for advertising online. This is an international discussion; it's not just companies in the US[3] that feel this way either.
[1] https://lists.w3.org/Archives/Public/public-tracking/2018Oct... [2] https://digitaladvertisingalliance.org/press-release/digital... [3] https://youradchoices.com/participating