'So timgriff6 the obvious becomes the stupid way out, doesn't it? If the ONLY check is of "odd one out", then it is no check at all. And if that is not the only check ( of which i am sure) whogivesa what the contents are packed in? '
Sorry, I was trying to give a logical explanation as to why this particular box was considered to be potentially 'more threatening than a bag'. I thought that was what caused the question to be asked. If the question was a simple one liner 'Are boxes more threatening than bags' without the story attached to it, my answer would be a lot different. If you want to check that out for yourself, perhaps you need to pack DG in both a suitcase and a box, check them both in every time you go flying and analyse what happens. Then you might get an answer to the general question. It could waste you a lot of time though!