You do it on a small scale. Everyone must be conscious about how important it is not to let anyone oppress you.
America was once conscious of this, and has slowly been turned into a nanny state, where the loudest and most influential voice is the Concerned Mothers Against Harmful Things party. The idea of liberty now is to choose from a range of options these people graciously provide.
Explain how this bullshit will not repeat, and repeat, and repeat. As far as I can see its happened to other countries too, dude.