"I ended up skipping my the flight from SFO to LAX because a friend of mine was driving down the night before; I figured I would keep him company on the drive, and I would get to spend an extra night in LA."
In my experience, that basically canceled his set of flights ,and he was no longer a customer. That's been my experience for at least 10 years of flying.
I didn't read the rest of the article, but I presume he discovered, the hard way, on a thanksgiving weekend - that he had no ticket whatsoever and was SOL.
That's really nothing to do with United, and to call it Customer Service, when you aren't actually a customer, is stretching it.
Now - My story of Taking a Greyhound Bus from Reno (Amtrak was sold out), (I had a ticket for the 9:50 AM, but they oversold it, and I didn't get on until 12:45 - after arriving at the Greyhound station at 9:00 AM in the morning) could have been negative, but, I'm traveling freaking thanksgiving weekend! I figure it's even odd's I don't even make it back home Sunday, so anything better than that is an Epic Victory. :-)