This is one argument that isn’t cut and dry. Okay, here’s the paradox. This is hypothetical. I can fly DAY-CVG-LAX for $296 or CVG-LAX for $850. Now say I live in Cincinatti. I may say, hey, I can book the day-cvg-lax for a lot less then the nonstop, and just not show up for my Dayton run. Now, most, if not all airlines have a rule that forbids this and will void you’re ticket.
Argument 1: It is the airlines rules, and you are clearly trying to scam them out of money, and therefore should pay more to do this when checking in, or be void you’re ticket.
Argument 2: You bought the ticket. It is you’re money payed, and you have a right to show up for a leg or not. In fact, less weight on the plane would save the airline money, even a small amount. It is not moral for an airline to charge you more for less.
I agree with argument 1, but that is just me.