I didn't watch that movie either but the quote does seem to suit this conversation very well on why people are following the law when it's pretty nonsensical. I think to me, eating on the train is 'okay', provided they are candy, chocolates, plain water, as long as they don't smell (no burgers, durians, meat, thingy) and don't make a mess or leave an unwanted stain (Coke, Pepsi, Ribena, etc). And as long as they keep the wrappers and throw them away later and not litter on the train.