Say it were implemented in this world and you could say anything you like (written, spoken, signed whatever) to anyone who can hear/read/see it. What kind of problems could that create and are there any ways to resolve them without limiting that absolute free speech?
Could it even create unsolvable logical errors? E.g an omnipotent god can’t create a stone too heavy for itself to lift. Maybe there are similar things with absolute free speech.
Shouting “bomb” in the airport should be allowed because TSA is bad at their job? So if TSA were good it shouldn’t be allowed? I’m not sure I follow your reasoning.
My argument is that plane travel is this safe despite TSA being so hopeless therefore the use of such speech will have no effect on actual safety and restricting it is an unnecessary restriction of liberty for no actual reason.