In S1E18, Paris asks Rory for feedback on her “manifesto” for their mock government project. Rory says, “My first thought, lose the word ‘manifesto.'” Paris asks, “Too ‘Cabin in the Woods?'” Rory answers, “Don’t open your mail.”
This is a reference to the Unabomber, aka Ted Kaczynski. In 1958, when he was only 16, he began studying at Harvard. Several years after earning his PhD, he became a recluse, living in a cabin in rural Montana while trying to become self-sufficient. He started sending out mail bombs in 1978, and continued for almost two decades before being arrested by the FBI. His manifesto, in which he calls for people to fight against “the system,” is actually what got him caught: he mailed it to The New York Times and said he would stop sending mail bombs if they published the letter. They did, and Kaczynski’s family members recognized the writing and contacted the FBI.