Just found this, so I realise I am well late, but....
Number one, I am a postman, and our work has grown phenonemally in terms of delivery over the years, so one more letter makes no difference.
However, my real reason for responding is when will everyone realise two things about junkmail. (a) it subsidises our salaries to the extent that without junk mail, you'd all be picking your mail up at the local supermarket or whatever. (b), there are other companies in the system, who, until they set up - IF they set up, which is unlikely - their own delivery system, use us to deliver their mail, and we have no legal control over it, other than a legal duty to deliver it. This means you can register with who you like and it won't make any difference, apart from the fact that the money which was Royal Mail's, is now someone elses. which means more job losses and that supermarket trip getting near and nearer.