We need our infrastructure to stop treating bank account numbers and social security numbers as secrets. At least in the US, bank account numbers appear on physical checks and are required to be shared in order to do an ACH transfer, and a social security number is not supposed to be used as an identifier (unless to the Social Security Administration itself) or as a secret password.

Ideally, nothing nefarious should happen if both of them were listed and queryable publicly.

You all need a better system than US SSNs

You can buy your SSN for $6-$10.

Firewalled VM, locked-in keyboard/mouse, 1 query to any agent and it's setup.

... support cash, tell your neighbors