"Call routing information, like all metadata, can only be protected legally not cryptographically."

A counter example of this is seen through ImperialViolet's pond(https://pond.imperialviolet.org/). Using pond, neither metadata nor content are leaked, as both are transmitted over tor every set interval.

> Call routing information, like all metadata, can only be protected legally not cryptographically.

In this system. You could, for example, route calls over Tor (with crippling latency). There is no theoretical reason you can't make a fully anonymous audio comms system.

There is no such thing as low latency anonymity.

Have one million devices constantly streaming a random stream of data to each other; when a device wants to communicate with another it just swaps the random stream for the encrypted stream.

Hence a trivial example of low-latency anonymity achieved through using bandwidth.

There isn't enough RF bandwidth and batteries aren't good enough to support this.

>There is no such thing as low latency anonymity.

At this moment. You are devoid of imagination if you can't conceive of this happening at some point in the future. The concept does not contradict physics.

Wardriving?

You realize that Canada is part of the evil five eyes.