As to his decision to block Gmail (or any other freemail provider), everyone with sufficient knowledge in the field knows that these operations are prolific and habitual sources of spam (via multiple vectors, not just SMTP; Google accounts for more Usenet spam hitting my filters than all other sources combined). It's thus not at all unreasonable for some operations to revoke (some oor all of) their privileges by way of self-defense. So I think a better response would be to skip the snark and instead reconsider the decision to use a freemail provider for professional (outbound [1]) communications.
They are also prolific and habitual sources of people who might want to use email.. By your measure (and everyone that blocks these services), when is it appropriate to have a gmail/hotmail account? Are you saying that the general population are all doing it wrong and that we should all change? Or am I missing your point entirely?