That's true. It's almost like the prisoners dillema. I think that in a world with no priority queueing, I would still not care about the only queue and show up

That's true. It's almost like the prisoners dillema. I think that in a world with no priority queueing, I would still not care about the only queue and show up at the gate at the last possible time. Problems would arise if everyone behaved like me. You would have everyone showing last minute and chaos would be the result. I wonder how the system would adapt to that.