[Peroni]

>You can insist on retail vendors accepting legal tender by law

That's a common misconception. In most jurisdictions retailers can set their own payment policies.

[cryptonector]

The point is to demand that they be legally required to accept legal tender.

It's a tremendous pain for retailers to accept cash, which is why they're willing to accept high transaction fees from online points of sale.

[thaumasiotes]

There is an interesting parallel to the code of Hammurabi, which specifies that certain vendors must accept payment in grain as well as silver.