>If you think you're smart enough to not fall for that
What? Seriously? There's nothing to fall for here.
You should never trust an inbound call. If your bank calls you, you take their information, immediately hang up, find the banks phone line and call that number back yourself.
'We have detected fraudulent activity, call us back with the number on the card.'
You hang up. They don't. You pick up the phone, and dial the number on the card.
Depending on how landline phone routing works in your area, you hanging up does not end the call. You picking up the phone again resumes the previous call, you dialing some numbers does nothing, the scammer makes some telephony noises, and goes ahead and resumes their conversation with you.
Nothing to fall for, eh?
Also, please keep in mind, we are apes. The logical centers of our brains turn off when your bank calls you to tell you that you are being robbed. Especially if your mind isn't as sharp as it used to be.
I literally do not know a single person with a landline, so I cannot say if that is remotely true or not. I'll take your word for it. But what I am 100% sure of is that you could make any telephony noises you like down my phone and you will not succeed getting access to my banking details.
You'd probably have better luck calling the bank and trying to persuade them.
The point isn't making the telephony noises, the point is that most people have no idea that in certain situations, hanging up the phone and dialing a new number does not actually dial a new number. It sounds like you didn't know about this, for instance.
And again, this isn't about you. Most of the time, you don't pay for fraud, the bank does. That means that your bank is incentevised to reduce fraud, at the expense of your convenience - because not all of their customers are as smart as you are.
Do you have a scam in mind that doesn't depend on a rampaging time machine forcing me back to the 1990s? I don't think I've used an analog land line for decades, and I definitely don't know anyone who has one now.
What? Seriously? There's nothing to fall for here.
You should never trust an inbound call. If your bank calls you, you take their information, immediately hang up, find the banks phone line and call that number back yourself.