I was running late for a return flight from Sydney to San Francisco due to extra security checks and botched check-in procedures. After running from the check-in counter toward the gate, I realized I was still holding the SWU with my boarding pass, passport, etc., and ran back to give it to the agent who looked at me incredulously, but took it after telling me it would have never been tracked and it would have been mine to use again.

On one hand, I did the honorable thing and may get some karma points out of it and it would have left me holding an odd number of SWUs and therefore I would have been able only to confirm one way on my next trip without using miles.

On the other hand, Stupid! Stupid! Stupid!