Democratic Tyranny

"It's the natural state of men to want to live free...in their own country. I belong to this land. Where do you belong, Arthur?"
--Guinevere (King Arthur)

What is the implication when the government bans or regulates citizen behavior related to drinking alcohol, smoking, eating fast food, texting on your cell phone while driving, etc? As Lew Rockwell notes, such intrusion implies that:

You don't know what's good for you so you must be forced to do what the government thinks is good for you.

People support such intervention because they believe that they are smart and understand what's good and safe, but others do not.

This is a primary avenue by which freedoms could be abolished in a democracy.