Originally Posted by Doltzbert
He wants to fly from LAX to an yet undetermined airport in Brazil, flying yet undetermined dates "at the end of the year". He was wondering if bribing a flight attendant with $400 - $500 would get him upgraded to First Class. And if so, what's the chance of doing it again on the return flight.
Not having tried myself, but I'd suggest the best way to pull this off would be to offer the cash to someone who appears as a business traveller (eg they didn't pay for the ticket themselves) and simply swap boarding passes with them.
However, this being said, I can see making such an offer to someone going down the very wrong way. A quick whisper to the TSA, and you're gig is up.