That's not actually his problem. They could easily add an unsubscribe link and make everyone's lives easier, but that would screw up the faux familiarity.
In fact, if this is a US company, I'm reasonably confident those messages are not CAN-SPAM compliant.
It may well be that, but that doesn't make it okay. They shouldn't be building an email database by scraping, which is almost certainly what happened.
In a vaguely related note: I recently had a situation with an organisation that kept bulk emailing a plug for its conference and would ignore requests to eliminate all addresses using[mydomain].com from their database (they were sending email to aliases as well as actual mailboxes).
It's possible that someone is automatically forwarding a different address to maddox's inbox.
It'd be worth examining the SMTP header of one of these messages and tracing back the ownership of each relay.