Sheesh! Perhaps around the third trip to the loo, one can suggest trading seats.My biggest gripe is trying to find a seat on a sold-out train and getting a dirty look from the other passenger when you ask if the aisle seat next to him is taken. Then that passenger has to get up to use the restroom every 45 minutes due to age/medical condition and I am awakened from my peaceful nap.
On a St. Louis-bound train a couple of summers ago, I watched a conductor rope off a block of 8 seats for a youth group, which boarded in Joliet. One member of the group moved to an unoccupied seat and sprawled over the pair. The next time he came through, conductor moved him back to the group and gave him a stern lecture. If he was going to the effort to keep a group together, he was also going to make sure a couple boarding later could sit together. (There was, and they did.) Kudos to the conductor.
Last time on #50 (Eastbound Cardinal) to Cincinnati, I asked my seat-mate where he was going. He said Charlestown, WV. So I switched to the aisle seat so as not to have to climb over him at 0300.