Perhaps a good way forward is to come up with a positive incentives, like already exists with the various badges for CI success, test coverage, documentation, v

Perhaps a good way forward is to come up with a positive incentives, like already exists with the various badges for CI success, test coverage, documentation, valid HTML5, etc. There could be a service that verifies that PGP key can be fetched and the latest pypi version verified. To avoid putting the burden of hosting on you, perhaps you could provide a python script which takes the package name and allows people to self-validate?