"As do I but that doesn't mean you can or even should force private citizens to follow your beliefs.
Companies (data processors) are one thing. Personal mailing lists are another.
I don't want the incompetence of oranisations as that above dictating how i might use my own email services and clients thank you very much!"
True but the average end user is clueless when it comes to these data protection issues and that giving out an email address of someone without their permission is a data protection act breach. Given most people use their personal email accounts this way at home they bring those same bad habits into the workplace and we get stories of this type crop up.
I see this sort of thing all the time running through our mail server, eternal companies sending out a tender document and then including the email addresses of contact people of multiple businesses (many of which we have no dealings with) in the TO: and CC: field. People are always doing it.
End of the day end users are the biggest risk in any business and safeguards on company systems to prevent employee abuse of company accounts is a good thing, the problem is they just don't exist within email clients where email is being composed.