Salt?? Seriously???
Since we pack our in check bags, I just patiently stand in the TSA line in Atlanta and watch folks try to argue. .
Speaking of TSA in Atlanta....last fall, I forgot a snack bar in the bottom of my personal bag....I was the lucky one that time having all of my "stuff" removed from my bag and inspected, LOL!!
We're talking about 2 different things here, Security and Customs. Security only cares about safety, customs may want taxes due.