Have you ever gotten this feeling? "Aww! I'm not really sure I want to give these guys my e-mail address... They're going to start mailing me stuff I don't want. I don't even know them, maybe my mailbox will start getting spam? But I don't know what else to put here... Crap." No, you are not being paranoid. Here are some examples from my own mailbox.

Gigantic international soft drink maker whose name begins with 'C'

I participated in a competition and gave them a unique mail address. But they could be trusted, right? Not so. Within a year that address ended up in the hands of spammers.

Trusted international payment service starting with the letter 'N'

I registered an account which I used to transfer funds to and from gaming sites. Spammers got ahold of my e-mail address within weeks.