I have been getting these several times per day and the worst part is - last month I even sat and listened to the entire spiel on home security systems by the same people to see if it was a good deal (it was not - installation and the unit are free but the monthly monitoring fees are high). FRUSTRATING.
Ok everyone, listen up, if you pick up the phone, all your doing is verifying that a real person is there. And they are not going to stop just cause you pressed a number. They turn around and call you from the same number just one digit off from the previous one. Best thing is just not to answer. By doing so the robo-zombie call's will lessen.
Calls come into our office main line. I have to answer it. Often when I recognize that it's a bogus number (and my list is now very very long) I will pick up and hang up immediately. I can't let it ring off the hook. Best I can do is hang up quickly on them.