Instructions on what to do and what not to do when you recieve a message you believe to be spam.
Never reply to Spam messages, even when they entice you to reply to "remove" you from their mailing lists. Often the instructions are either bogus, or a way to collect more addresses. Replying confirms to the spammers that your e-mail address is active, and you may receive even more junk mail.
Don't flame (send a rude message) or mail bomb the spammers address. Many spammers forge e-mail addresses to hide their real identity, so you may be flaming or bombing a nonexistent account or, worse, the account of an innocent person.
Don't buy anything through unsolicited advertising by e-mail, even if the product is something you want. Buying the product legitimizes the spam, and thus adds to the problem. Moreover, many of these offers are fraudulent.