We don't answer the phone unless it registers someone we know. Anyone else gets to leave a message and we return the call, if appropriate.
But this week we got a new one: The sender on the phone listed us as the caller, complete name and phone number as if we were calling ourselves from our own phone. Weird. Of course, we did not leave ourselves any message, so who knows who (or what machine) was calling! Am curious if anyone else has had this happen!