Max - No implication at all, just making the point of what happens when you put sharp objects in everyones hands. Maybe if everyone on the bus had them as per your argument they could go round in turn and do each other by your implication!!!
I hardly think you can call air travel dehumanising. Its just a fact of life that if travelling on a flight you will have to go through security. Yes, there will porbably be jobs worths sometimes but, maybe I am lucky here, I have yet to really encounter one that really hacked me off. If you dont want to go through the screening then:
a) Drive - although you will have those nice border guards with machine guns to deal with.
b) Stay at home and watch Eastenders with a mug of Horlicks.
Julian.