The idea of running up a LOC and then kicking the bucket is laughable.
1. Any LOC with a high limit needs to be a SECURED LOC. Like secured against an asset (like a house or company). If you default, they take your house. If you die, your house gets sold and secured creditors get paid first.
So good luck with the "screw the bank plan"
2. An unsecured LOC will have a very small limit (in comparison to to secured LOC). Good luck living off of that. And when you die, they still want the money and will go after your estate for it (and get it).
So again, good luck with the "screw the bank plan"