 I've gotten actually marketing calls supposedly for my own phone number. That was weird. So best thing to do, don't answer. If you do answer, sometimes they will very nicely offer to take your phone number out of the list for future calls. That sounds quite neighborly, but... Don't even consider this option. By taking the steps to opt out, you're confirming that there's someone on the other side of that phone that they have called, and that is something they're hoping for so that they can actually use that number to call your...