There's nothing stopping you, no. But it is a violation of the contract of carriage. The chances of AA penalizing you for this are very minimal. This is called "Throwaway ticketing". You can Google it and read the millions of opinions on this strategy out there.
FAQ: Skipping Segment, Hidden City / Point Beyond / Throw Away Ticketing (master thd)
Last edited by econometrics; Feb 26, 2019 at 8:05 am
Reason: Added thread link