PGP keys don't tell you anything about a developers "real identity". Theoretically theres some "web of trust", but realistically everyone just blindly downloads whatever PGP key is listed on the repo's install instructions.
Bullshit. The public key can be obtained by several easy means, like visiting the publisher website or social network site like GitHub which is common. That verifies the identity just as well as any certificate! But with much less trouble.
Real identity is impossible to establish beyond any doubt, and a certificate is no better than a key on a website, in fact it's essentially the exact same thing.
