In their never ending quest to thwart spammers online, Automattic (the company behind WordPress.com) has announced that bloggers on custom domains can purchase private registration in order to prevent spammers, trolls and (God forbid) stalkers from contacting you with unwanted messages.
Starting today you can add the private registration upgrade when you buy a domain, or if you have an existing domain registered on WordPress.com you can make it private at any time. If your domain expires in less than six months in the current year you’ll get the rest of the year free but you will have to renew the domain and cover the cost of the privacy upgrade for the remainder of the domain’s lifetime. [...]
The private domain registrations upgrade costs $8 a year and you must purchase the upgrade for the length of time your domain is registered for. (Official WordPress Blog)
Private registration is probably a good idea for any blogger (regardless of platform), as the last thing you want is an angry commenter filling up your voice mail or email with silly statements at 2 AM in the morning.
Update: Changed image. Image Credit: Norebbo