"Sandboxing" in this context would mean to isolate the device such that it can't be affected by external factors, such as the mothership trying to "upgrade" its software. In this context, it might mean isolating its access to the Internet, such that its local network cannot reach out/be reached externally...."Sandbox" is getting thrown around here a lot. What does it mean? The hardware? The software? What exactly is involved and how does a normal user do it (if a normal user can)?