I'll give you a possible scenario ...
Some young attendant decides to pursue 'company policy' but gets it wrong. PAX watching and filming (not the accused) start getting uppity and tell crew they're out of order. Senior crew arrive and support colleagues. PAX get more uppity. Police are called and can see nothing wrong.
Crew, having been shown to be wrong, get uppity and decide they can't possibly manage this flight because PAX are uppity. Flight cancelled. WestJet make fools of themselves. The End.