The real risk
The real risk of hidden city ticketing is in the event of flight cancellations
If you are flying EZE to JFK to YVR and the EZE JFK flight is cancelled they may reroute you EZE to DFW to YVR. You'd be in DFW or YVR without a ticket to JFK.
So hidden city works best for full fare travelers that can walk away if a flight is cancelled.
Steve