> нет чёткого определения того, что браузер будет делать с DNT.

When a web browser requests content or sends data using HTTP, it can include extra
information optionally in one or more items called "headers". Do not track adds a header
(DNT: 1), indicating that the user does not want to be tracked. The execution of this
non-tracking directive can only be implemented on the part of the HTTP server, so its
enforcement is applied effectively using the honor system. In this regard, do not track is
similar to the robots exclusion standard, which provides a mechanism for HTTP servers to
communicate to automatic web-traversing client programs whether those programs are granted
permission to access the servers, but entirely relies upon honor and etiquette on the part
of the client for compliance.