Another phone call...
Me: Thank you for calling [name withheld] Auto Parts and Batteries, this is Steve, how can I help you?
Him: Ummm, yeah, I have a question.
Me: What do you need to know?
Him: Can a bad alternator make my starter go bad?
Me: That's very unlikely.
Him: Well my alternator was bad, so I changed it, and now the car won't start.
Me: Have you checked the battery?
Him: No.
Me: You might want to do that.
Him: OK. Thanks a lot. But I really think its the starter... I'll check the battery anyway though.