I would love to see the functionality of cargo-deny built into cargo, and a sensible set of defaults added that prevent people from accidentally using proprieta

I would love to see the functionality of cargo-deny built into cargo, and a sensible set of defaults added that prevent people from accidentally using proprietary code like this (while still allowing people to use proprietary code if they knowingly choose to, as well as allowing local first-party code by default so this doesn't stymie people's own internal development).