This happened on a recent UA flight of mine: A well dressed (business casual) guy was one of the last to board and seeing empty seats in C on the 777 he took one. He took a comp. glass of water and the flight took off. About 30-40 mins. into the flight the FAs came around to take breakfast orders, realized he wasn't on the list, asked him to move, which he did calmly and without complaint. I was in row 19 (front of economy) and saw this entire thing transpire through the open curtain. Turns out his actual seat was next to mine and we started chatting. He said he tries it all the time and it works about 50/50. He was very proud of a LAX-SYD flight he pulled it off. "13 hours of free business class" he said. Half of me thought he was brave and why not go for it, but the other half of me thought its dishonest and a little too much. He was a very smart and nice guy and I chatted with him the entire flight. He looked like any other biz traveler (maybe thats why it worked) he even had a Wall Street Journal. My questions for all of you are: Ever seen (or done) anything similar? What do you think of someone like this? Could this be considered stealing and therefore illegal? Could it be considered a security breach? I would love to hear any FAs views if you're out there.