Why so complicated, we’ve been having cabin crew come into the cockpit on toilet breaks for over 10 years now with absolutely no problems at all. “Distracting or bumping switches” what clap trap. So how would the crew get food and drink delivered then? I suppose the Pizza is slipped under the ballistic door is it.....oh and forget the cabin crew ever coming in to discuss any issues they need assistance with.......they might bump a switch or distract the poor Pilots.
rubbish.