Amazing that HN doesn't realize that transit networking is actually not expensive at all. You can saturate a gigabit connection at a colo for pennies, but nobody blogged about that, so nobody knows it's an option.

Torrenting is not pirating unless you are getting illegal content.

Copyrighted content is not illegal. Anyway, in this case, the initial download of the otherwise redistributable content would be piracy. From the docker TOS:

> 2.4 You may not access or use the Service for the purpose of bringing an intellectual property infringement claim against Docker or for the purpose of creating a product or service competitive with the Service.

Which is a great reason to default to / publish on other registries.

Like a P2P Docker registry?

https://github.com/uber/kraken

Spegel shares images between your machines (not everyone's) in a peer-to-peer fashion: https://github.com/spegel-org/spegel

Egress and storage is not free.