Is sneaking into a movie theater not stealing either? And even if not, what about the extra fuel that needed to be burned because of his weight?

You're right about the extra fuel, though I really don't know what an extra 100-200lbs would cost to transport.

The movie theater example seems similar to the airplane: as long as there's an empty seat then it seems like stealing isn't quite the right word. Freeloading might be more apt.

I don’t think it’s a systematic problem nor do I think it really negatively affects society substantially.

So I’m not going to be a Karen.

I applaud him for the creativity.

Plus him breaking the rules has led to improved security for you.

From ageism to sexism in a single comment thread.

Lol, stop making stuff up.