I hold the same view as the parent poster on public data online and my opinion on spam e-mail is that it's a consequence of naivete bordering on faulty design. It should have been set up with strong authentication (proof that this e-mail is from whom it says it is) and explicit consent (you can only message me if I allow you to message me). The latter could be as simple as rate-limiting e-mail from addresses which you have not explicitly allowed, or to which you have not previously sent letters, to one per week or so, with all such e-mails automatically going to the spam folder to be purged in a month.