Dead letters

Just came back from the gym. I can't move my arms, and my butt still hurts from the weekend of boarding.
What to do when you come home and some random person has left a message on my answering machine for someone else. It happens to me all the time, and people never leave a number to call back. I guess I should say my name in the answering machine greeting, but I always worry that solicitors will use it against me. And how come I keep receiving messages for new people? You'd think after a few of these, somehow folks would figure it out. I guess it's not quite as sad as misaddressed letters, which never reach their destination.There's a bad Hollywood movie in there, somewhere.