So you don’t care about the lives of the UPS crew? Got it. UPS operates passenger flights also.
How will putting this guy in prison make the crews any safer if UPS keeps putting packages on their airplanes that were clearly marked for ground delivery?
I checked on that, and it appears FAA regulations prohibit passengers (except for flight crew) on cargo flights. If they operate passenger flights, then they must be exclusively passenger flights, not combined passenger / courier flights.
To quote Ben Franklin "Half the truth is often a great lie."