Have we learned nothing from history?
DNT ended up being used as an additional vector for tracking! 
Because that’s one more header that your browser sends so it automatically becomes one more tracking data point.
Opt-out mechanics for personal info leaks will NEVER work. If you don’t trust a program, run it from inside a container where you have strictly approved network connections to the minimum amount of network hosts that the program needs in order to be able to do its job.