The baby formula is an exception that I'm fairly sure will only work if you have an actual baby with you. Since most terrorists aren't carrying infants it is d

The baby formula is an exception that I'm fairly sure will only work if you have an actual baby with you. Since most terrorists aren't carrying infants it is deemed an acceptable risk. Based on what I know about breastfeeding laws it may actually be illegal to restrict people from carrying these items. So based on what we know I'd say this rule isn't arbitrary at all. To me the better example of an arbitrary rule is laptop thickness. However we can speculate that someone has determined that objects greater than > 1 inch are more likely to carry explosives. We can argue that it's arbitrary, but aside from the TSA coming out and explaining the reasoning we will never know. And I'm not sure they are obligated to tell us.