Don't understand your point, as the airline does not determine what security takes or does not take - that's the government. Of course, security is applied unevenly. You have to remember that airport security is not to make you safe, it is to make you feel safe so you will continue to fly, so it really doesn't matter what they take, it only matters that they take things. That is why it is applied to pursers, Swedish grandmothers, and infants, so you will feel that they are incredibly thorough and consequently you will feel safe. The real job of keeping you safe is being done in Afghanistan, Iraq, Yemen, and such places.