the gov't doesn't need to use force. do you know how gullible people are? how easy to influence they are? it's only a small percentage who have their own opinions and views, the rest just base everything off the news, the radio, etc.
if old classic country suddenly gets played on pop radios, guess what everyones new favorite music will be.
if the news stations broadcast a terrorist attack that never happened, people will believe it.
force is not necessary.