Your tin foil hat can go away when you consider that you're instrumenting code that will permanently run in an observable sandbox. You control the server (for n

Your tin foil hat can go away when you consider that you're instrumenting code that will permanently run in an observable sandbox. You control the server (for node) and can watch what external requests it's making; and while you don't directly control the client, you do have access (via the web inspector) to all external requests it's making.