many people start off this way, and eventually learn what they need to know and become the breeder's we have today and there's nothing wrong with that... Now with that being said, this particular person (I could be wrong) seems like your typical Craigslist shopper. They see the word python and boom just go off that. They don't know if they're inquiring about a ball python or a reticulated python. They just want a python. Those are the same people who later on try and rehome it as a "boa python". Don't get me wrong I use CL sometimes as well, and I get some traffic from my ads, but I hardly ever sell through there because of this specific reason.
You should definitely try and educate them, because even if you don't sell them a snake, someone else will. So might as well and try and save whatever animal they purchase.
Good luck in whatever it is you do.