Greg's post reminded me of something too!

When I lived in Virginia, they had something (I totally forget the name right now) that was like call blocking, but it also had a wonderful feature! If someone comes up Anonymous or Blocked Number or whatever, they have to leave a message saying who they are OR they can't get through. Even if they got your number, you could still not talk to them.

Call intercept! That's what it's called!

Call your phone company and explain your problem. (That you are being harassed and you want some kind of "defense" system.) They should be able to help you...they deal with this all the time.