I take Amtrak to visit my folks. Not only is Amtrak one of the most unreliable and poorly organized forms of transportation available, but it also has some of the most questionable clientele I've ever seen.* I could give a bunch of examples, but I think a picture is worth 1000 words.
Yes, amidst the confusion, there is a man attempting to bring a gallon of milk on what is going to be, at the very least, a 2.5 hour train ride. Interestingly, this guy was selected to be randomly screened by security. Kudos to Amtrak security for realizing that there's something wrong with this picture.
*I say "one of the most" because the bus is way, way, way worse.