Perhaps untypically, I am in complete agreement about the value of dark humour, including the poltically (very) incorrect at times, amongst members of an occupational/professional ‘in-group’, one that is ‘closed’ to the uncommitted; to those who have not taken a vow, spoken or unspoken; to those who have not undergone a form of initiation, planned or not-so-planned, that takes one over the invisible threshold of being “one of us”, and known as being thus.
People who have experienced such a transition will recognise it at once without further description. And everyone’s experience will be different but at the same time, the same.
And it confers a freedom to be unconfined, ribald, obscene, filthy-minded and filthy-mouthed, all within the bounds of the in-group, and without any injury or malice or offence caused or felt.
But it can’t exist without a correspondingly deep respect for life and for the sacred personhood of every being. That is its saving grace.
That’s where I deeply appreciate your (@simonfly’s) impulse to break out of your flight deck, rip off your tie and scream “WE’RE ALL GOING TO DIE!” It’s your privilege for keeping your aircraft safely in the air, when it’s potential is to fall to earth with everybody in it.