I sit by my keyboard waiting to be proved wrong, but I don't think the Guardian actually gave out email addresses - it was just satire. It would seem that the replies were all to the Guardian in response to their editorial, not emails they actually received (although I guess it is possible for some stupid Britons to find an email address for someone in that county independently and then do as the Guardian suggests).

Edit: again: the humour is in the notion that (the people of) a democratic country would even consider interfering with the cracy (political power) of another country.