Indeed - what I'm suggesting is not that we have some opt-in standard that people may or may not follow. Browsers should go nuclear on tracking, and remove any feature that permits it.
The problem is, it's very hard to define what tracking is. That's why GDPR is General Data Protection Regulation. As it places the onus not on the tools to try and implement some ways to evade tracking, but on the companies who pretend that tracking is their god-given right.
Because tracking is significantly larger than just placing third-party cookies on the users' machines.
