I used to work a job where we did a follow-the-sun model, so not only do I not drive, I'm not even in the US - but I did answer a US 877-number for part of the day.

We'd get one or two of these calls per month. I don't think there's a chance in hell these are targeted - randomly dialling 877 numbers in the hopes that one will be answered by a human instead of another robot has to be a complete crapshoot.