Registration stops bots spamming. You have to supply a real email address then activate your account via a link that we'll send to it. Once you're registered, we can use the email address to let you know when DVDs are posted that you might be interested in, and for other members to contact you by. (Messages are sent through the site - you don't have to give out your email address to anyone else, if you choose not to.) You can choose which kinds of email you do or do not receive. You can opt out of all of them if you prefer.