Think Progress listens to Rand Paul, self-proclaimed defender of individual liberty, who believes that Americans should be imprisoned for listening to speeches:

PAUL: I’m not for profiling people on the color of their skin, or on their religion, but I would take into account where they’ve been traveling and perhaps, you might have to indirectly take into account whether or not they’ve been going to radical political speeches by religious leaders. It wouldn’t be that they are Islamic. But if someone is attending speeches from someone who is promoting the violent overthrow of our government, that’s really an offense that we should be going after — they should be deported or put in prison.

He’s not unusual. There are genuine libertarians out there. But political figures who talk a lot about liberty and freedom invariably turn out to mean the freedom to not pay taxes and discriminate based on race; freedom to hold different ideas and express them, not so much.