If you have a Blackberry, you are in luck. BerryWAV, a reputable software company that is best known for their Berry Record application, has recently developed a new application called Efficient Call Blocker. This application allows Blackberry users to explicitly deny calls that come up on caller-id as private and unknown. The application also allows users to add numbers to a customized list that the Blackberry will also auto ignore.
The power really comes in behind this application when it is used with a ditch mail service such as YouMail. Once the telephone call is automatically ignored, the ditch mail service can be setup to make the harasser hear a voice mail message stating that your number is disconnected and no longer in service.
Efficient Call Blocker can be downloaded at: