The ability to scam people exists and isn't going away. People went town to town in covered wagons selling bullshit. People scammed others out of money centuries before that.
The answer isn't pearl-clutching nonsense about how this technology is so different and so morally reprehensible compared to everything else. The answer is education. If someone shows up at your door and sells you a bottle of water that will cure all your ills for $100 then skips town, most people would see it as your fault for being so gullible. Someday there will be some technological or social way to easily differentiate deep fakes from real video the same way you can with photoshopped images today.