Originally Posted by QueenOfCoach

Once you no-show for any flight segment, the entire ticket is cancelled. Be aware, as well, your bag will be checked to your final destination. You can't short-check your bag.

Conventional wisdom states:

1. Abandon only the final segment of the ticket.
2. Take carry-on luggage only.
3. Don't make a habit of it.

There are reams of debate on this forum about hidden city ticketing. Some say it's OK to fly something other than your paid-for ticket, thus saving some money. Those folks can cite countless false analogies. (Six-packs of Coke, bundled cords of wood, etc) Others say that is, essentially, theft of services from the airline. There have been instances where a person gets a bill for the true value of their past tickets, negating any savings from what the airline defines as fraud.

Personally, I'm pretty much neutral on the subject. I like to sleep well at night, so wouldn't do it myself. YMMV.