If he did not need a seat belt extender,, then it means (from my personal experience) that his waist size is under 52" (on the older planes0 or under 50" (on the newer ones).
That in no way should interfere with others or with exit.
I believe your policy is unfir as it does not address other body types that cannot fly comfortably and could impair others ability to exit. For instance, those over a certain height should be barred from ever flying, as they cannot purchase additional head room and thus could never fly comfortably. Also their long legs could easily get in the way and they cannot purchase additional leg room.
... View more
