>Even if you're completely awesome and use SSL everything (like, say, Gmail), eventually that e-mail you sent is going to find its way from Google's servers to its final destination. That, with almost no exception, is plaintext.
Gmail sends mail out using TLS where available (though I agree with your point).
That's only even a problem if they target you. Danger comes when they can target everyone simultaneously and use automated means to find those who match their profile as enemies of an agenda.