If someone does buy it they could still fake a car. Buy it just for the hidden vin#s to be grafted on a donor or new body. Get a fake trim tag and get a vin# or close to actual. The sad thing is that many buyers would not even think of comparing the hidden vin# with the title.
And i have seen state issued vin tags that use the original vin#, by having a cop look at the hidden vins. Roger