Your adversary probably isn’t the NSA, it’s commercial tracking services. Their business is tracking the general public, they don’t care about one weird person.
Unless avoiding this becomes common practice and then the whole story changes.
> Unless avoiding this becomes common practice and then the whole story changes
If that means that everyone starts to use random mac addresses, you still can't identify specific persons based on their randomized mac addresses when they change them every time they reconnect.
Unless avoiding this becomes common practice and then the whole story changes.