> If your aunt is using a wired phone, I recommend getting a model which has Caller ID with voice announcements. This is great and does not require any effort to learn -- phone says "RING RING CALL FROM 1-800..." and you just tune it out.
I would normally say "n=1" and "YMMV", but in this case n=everyone I've ever had this discussion with and the mileage has not varied. I don't know about you, but I have received exactly one phone call in the past year from a 1-800 number, and it was legitimate. You know how many calls I receive daily on average from people spoofing what they think is my local area code? Seven. Sometimes it's none, sometimes it's 12, but I have been tracking it for this exact purpose and the average is 7. That's too many.
Do you think anyone would have adopted email if the only two options to deal with spam were 1) read the text in the body and manually delete it if you can recognize the scam or 2) disable incoming mail from anyone not already in your address book? Of course not! And it's high time that the company charging me for my expensive phone and my expensive service plan do something about the expensive attention I waste when getting interrupted with these extremely preventable attempts at exploitation. Not to mention the poor victims who fall for these scams and lose their retirement savings because they grew up in an era before incoming calls became synonymous with massive social engineering dragnets.
I apologize for ranting- I recognize you were offering a workaround in the meantime for the parent and I've upvoted you for that; I rarely rant on HN, but this topic and the apathy surrounding it really ruffles my feathers and I needed an outlet.