It's my understanding this was mid flight and not a situation where the seatbelt sign was lit. I believe the original commenter is suggesting that people wear their seatbelt at all times, if possible, seatbelt sign lit, or not.
(Which, as once a very frequent flyer, I do, others don't like to if they don't have to).
My point was the fact the "fasten seatbelt sign" was not lit in the middle of the flight makes people think it is OK to not have it fastened. Which isn't true.
Yes, maybe. I was on an international flight last week and they said, over the intercom, that they suggest you keep your seatbelts fastened all the time where possible.
Maybe they should play some in flight video of one of these events.