Re 1 I am not sure this gets you anywhere
There is always someone else watching you
1. Yes. But be aware that only very few honour your DNT-request.
2. Privacy Badger 1.0+ blocks fingerprinting by third parties, when it detects that it is used to track you (same as for cookies). See https://github.com/EFForg/privacybadger/blob/master/doc/DESIGN-AND-ROADMAP.md#fingerprinting-detection