Don't be ridiculous guys, seniority is the *only* fair way. They have *earned* it. Somebody mentioned why should the senior worker get to go on vacation while the other doesn't? Well, because they *earned* it. They have been there longer, so they should have more benefits. Just like all the companies who reward more vacation days to the senior employees.
Imagine this, what if a person (person A) who has been working for US for 20 years is commuting to his job, while another person (person B) is a part-time, 1-year Joe Blow visiting his grandma. Person A is flying on flight A, while person B is flying on flight B. They both check in for their flight 12 hours before, so they are set. However, flight A is cancelled so person A has to fly on flight B. Why should person B have more rights to the seat?
For the most part, it seems that it is US and HP employees fighting against each other. Why don't you see US people arguing about not getting a seat on a flight to a senior person? Because they realize that that is a benefit with seniority. You HP guys are just freaking out because you think all the US employees will be senior to you. Don't worry, there will be a day (most likely soon) when you can bump off the newbies. I bet you won't be complaining then.
Seniority, way it may not seem fair at times, it the *only* fair way. Besides, for much of the years to come, a lot HP employees will stick to the West side, while US employees will stick to the East side, so that way, you won't have an unfair seniority issue here.
Come on guys, I can't believe we are agruing about a long-accepted thing, which is seniority. You do know that the earth does not evolve around you, so there will be times when you don't get a seat. Non-reving happens to be that way. There was/is no guarantee that there is a seat for you. Tough luck, life sucks; complain and get on with your life.