That may not make the scam totally impractical to all but the most dedicated hackers, but it does increase the scam costs substantially. Maybe enough to remove

That may not make the scam totally impractical to all but the most dedicated hackers, but it does increase the scam costs substantially. Maybe enough to remove the low-hanging-fruit from the scammers and have them target elsewhere. So, I don't think "that wouldn't change anything".