[Political Junkie Too]

I know that these are small spaces, but what about a double-door system, like an airlock. Have the FO exit the cockpit via the inner door, lock it, then open the outer door to the cabin? Put a camera and intercom in the between space.

-PJ

[CedarDave]

Or a folding door between the seats and the galley. It wouldn't have to be exceedingly sturdy, just enough to deter a rush to the galley in the few seconds the cockpit door is open. Shut it some minutes before a crew member comes out and reopen some minutes afterward.