That would be a rare occurrence. It’s never happened to me but did happen to DH once years ago. He simply told the agent at the connection that he was ill and couldn’t continue. If it happens and you tell them, all is well.
This whole thread made me curious so I’ve read several articles. The dad admits that he has been doing this for 5-8 years using the skiplagging website. I’m betting that AA had finally flagged his account because of the frequency. Dad bought the ticket on his account and triggered what occurred. I looked at the website and they clearly warn against doing it often, connecting the ticket to FF accounts, and so on.
https://support.skiplagged.com/hc/e...87-What-is-Skiplagging-or-hidden-city-flying-
Every time I fly I’m amazed at the number of people adding to the hassle of air travel by lining up to check baggage, have an agent print a boarding pass, or even just waiting for a turn at a print kiosk. I put it down to inexperienced travelers in a stressful environment wanting human support.
We rarely check baggage preferring to quickly clear the airport rather than wait for luggage. If we need to check we do it at the curb- well worth the tip. As for boarding passes, having it on your phone is just one less thing to keep up with.