Comment I tested this and found that Unsubscribe works (Score 1) 481
About two years ago I tested this theory and found just the opposite.
I had been regularly receiving large volumes of spam in a hotmail account, so I created five fresh hotmail accounts. I then unsubscribed to about 100 spam messages from my main account using each of the new accounts (split into groups of twenty per hotmail account).
After two months, I still had received spam on only one of the accounts. I was truly shocked. (I submitted a SlashDot post about this at the time. It was not posted.)