I doubt that they didn't weigh the personal effects pouch accurate to within 1 gram beforehand, so whatever they brought, it was within the specified weight allowance.
In this case yes, but what if it did matter? What if something happened and they became loose or had a chemical that set off some sensor? There is probably more than just weight checks. Safety of ship, crew safety, imagery they wouldn't want on any footage or photographs, etc.
Some were declared; why weren't these? It is suspicious behavior. What else could have been brought on? What failures of process and policy allowed this to happen?
Some were declared; why weren't these? It is suspicious behavior. What else could have been brought on? What failures of process and policy allowed this to happen?