You need a valid e-mail address to register.

[DZComposer]

I just checked the awaiting activation queue, and noticed a significant number of people registered with obviously bogus e-mail addresses (IE "donth@ve.one").

Because of the prevalence of Spambots, e-mail addresses are REQUIRED to register. We send out an activation e-mail that must be responded to as described within the email to use your account. If you do not follow the activation link, you account will remain locked.

If you do not have an e-mail address or do not want to give-out your main e-mail address, then please create a free e-mail account somewhere.

Some free e-mail providers:

http://www.gmail.com (Google Gmail)

http://www.hotmail.com (Microsoft Bing Mail)

http://mail.yahoo.com (Yahoo Mail)

[Steve]

Most are bots too, so it's easy to identify them. They normally use "username123" with emails like "username123@mail.com" and have IPs from Asia  :P

[Icy]

Most are bots too, so it's easy to identify them. They normally use "username123" with emails like "username123@mail.com" and have IPs from Asia 

Or advertisements in their signatures. :P

[Sabre]

If you are really really paranoid about it, there are services like mailinator.