I just split all my email accounts up, so they're not all forwarding to one account.
SO now I see that certain accounts are riddled with spam, while some are reasonable. One of the 'clean' accounts had a piece of spam in it, so I decided to click the unsubscribe link.
It was a form in which my email was populated. It had two options: "No thanks" and "Yes" -- but the question was "Do you want to recieve promotional emails from us." So the instinct would be to hit "Yes" to unsubscribe, and then you're screwed.
Wait for it...
I make it past their riddle, and when I hit submit, I get a dialogue box saying.. "Are you sure you want to do this? If you're not sure, click ok. If you are, click cancel."
So if you click OK you're still subscribed. Cancel unsubscribes you.
I feel dirty now.