"Liking" something on Facebook is free speech.
A US Court of Appeals has ruled that "likes" on Facebook are protected as free speech under the Constitution.
In 2009, some employees at the Hampton Sheriff's Office in Virginia lost their jobs after liking the page of the guy running against their boss in an election.
US Circuit Court Judge William Traxler ruled that clicking "like" is the "Internet equivalent of displaying a political sign in one's front yard."
Facebook and the ACLU had weighed in on the case, supporting the reversal of a lower court's earlier ruling.