My relativers and friends now idetify themselves right off when they call from other than their usual number because they know I NEVER answer the phone for a call from a number not already in my list. Caller ID is the best thing since litle green apples. I also use call blocking and wish there were more slots available for that feature. Spoofing a caller ID gets you onto my blocked list immediately even if it's an innoent call. The list stays full all the time. The Do Not Call list is wholly ineffective in my opinion -- another case of government failing to do what I can do better.