"You're entitled to criticize the government, and you can use words, you can use symbols, you can use telegraph, you can use Morse code, you can burn a flag," he told the students.
Scalia also said that he and other justices do not let politics influence their decisions, and that he believes that the U.S. Constitution is a fixed law.
"The Constitution is not a living organism for Pete’s sake,” he said. "It's a law. It means what it meant when it was adopted."