How exactly do you imagining checking a bag as a jumpseater at the ticketing counter (outside of security) would work?

Without introducing yourself to the Capt. of the flight and receiving permission to ride, what's the basis for expecting that you (and your checked bag) would be accommodated?

I'll skip the SSI concerns on an open forum, but dude, really?

FedEx offers an amazing professional courtesy in the form of discounted rates. If I'm on vacation or traveling with gear on days off that's been a great way to go.