Imagine the outcry if an ATM touch screen wasn't properly calibrated, and you ended up drawing money out of someone else's account.
Couldn’t be someone else’s account in this scenario. It’d be withdrawing 50 when you wanted to click 20.
There’s an urban legend about a short lived bug in some bank’s ATM’s where when you manually entered the sum you want you could put in anything you want and it gave you the closest bill it had, but deducted what you entered.
So if you entered 0.01 then it deducted that and gave you whatever the smallest bill it had was.
As a computer programmer I find that story very plausible.
Imagine the outcry if you had an ATM that could withdraw money from someone else's account.
Any ATM that had the ability to withdraw money from somebody else's account when miscalibrated would also do so when correctly calibrated. It's just that, when correctly calibrated, the user would be less likely to do it by mistake.
It would be something like withdrawing the wrong sum of money