Note that the primer mentions that you should not use links in spam that promise to unsubscribe you from their mailing list -- quite the opposite. By clicking the link, it posts your email to a script that adds it to a 'valid email' list, which will subject you to even more spam!
By the way, "This is True" is a great email newsletter, with hilarious true stories culled from various sources, and then commented upon, not unlike we do at FR. There's a free version and a pay version. The guy that runs it seems like he'd be a FReeper.
I agree -- I subscribe to "This Is True" as well as its sister newsletter, "Heroic Stories," and they're both excellent.