Assuming you're talking about emails... You have three options. (1) 'unsubscribe' yourself from their mailing list (there should be a link in the email you get) - (2) mark the next one you get as 'spam' or 'junkmail' - which will send all future emails to your junk-mail folder - (3) block the sender - which will simply 'bounce' future emails back to the company.
If you are signed up to receive emails from WikiAnswers you can opt out by selecting the "unsubscribe" link in the bottom of an email when you get it. You can also sign into your account and under "My Settings" disable all notifications, or just the ones pertaining to email and newsletters.
With a single go you cannot do this, individually you have to unsubscribe from the mails that you don't want in future.
Yes, a network monitor program is designed to show you all of the parts of a network packet. Even your visited websites, chat messages or emails content. I saw a product name "WFilter" can do that.
You text STOP ALL to 632-32
You get all this because people and even big companies on the internet sell your information for the advertisements. You can tell them to not to contact you and unsubscribe to emails or phone calls. If it still keeps happening then you can complaint about it to the company.
The same email address that you use for all your emails can be used or you can get an email address and use it just for the PSN
All the deleted Emails are stored in the Trash tab. These Emails can be recovered easily. They could be brought back to the primary emails.
You can adjust your email preferences to unsubscribe. When you are logged in to Answers.com, click on the "My settings" link in the blue navigation bar on the left side of the page. You'll see check boxes under "Email updates". Remove ALL check boxes from "Email updates" to stop receiving emails from Answers.
Emails usually do not begin with www. Website URLs do.
ALL
On average, about 45 of all emails received daily are considered spam.