It's guys like ditch and jungle that would be the first to ask the Captain for the flight deck jump seat when they need it. Please Mr Captain, thankyou Mr Captain!
Try and get them to help out by releasing an assist jumpseat; it's no way, it's a safety issue, it'll disturb other pax, you'll disturb me reading my New Idea. Any excuse will do because it impinges upon their little empire.
You know the best thing, it's out of their hands anyway. It's now policy and it's up to the CAPTAIN, not them.