First Time post, long-time reader -- I was able to book JFK/HNL trip via SFO a while back for $280.00 on UA (thanks to FlyerTalk posting). Due to tighter TSA regs etc. I was wondering if there were any ramifications (legal or otherwise) of using the JFK/SFO/HNL/SFO portions of the ticket, and not using the last segment (SFO/JFK) after boarding pass is issued. I do not intend to have any checked luggage.