It's easy to create a fake email address. In fact, you can make as many email addresses as you would like. A fake email address is good if you want to have an email address that you use to sign up for things online that might produce spam. It might also be good to have a fake email address if you want to email people and not let them know who you are.
Find a free email site. There are many to choose from, but some good ones include Hotmail, MSN, Gmail and Yahoo.
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Click on the "New User" or "Create New Account" link, usually found underneath the login area on the website.
Follow the on-screen instructions to set up your account. When it asks for your first and last name, put in a fake name. You can also put a fake name into the field marked "display name."