I think the thing bral was objecting to is this:
...always having to have two in the flight is a dumb rule.
Well, it looks like I was wrong. Incredibly, in the 21st century, some aircraft with highly dangerous and unsafe lockable cockpit doors with locking systems in the cockpit only are still legally allowed to fly. Because of this oversight and a failure to install surveillance cameras, an additional person always has to replace a pilot leaving the leaving the cockpit. And quite right so!
Bral's reply regarding Muppets is not worthy of a response.