I'm no expert but generally you never know what freedoms you've lost until the Feds are at your door. One that comes to mind is the illegal siezure of property without due process of law. No-knock warrants, such as the guy in Norfolk who is facing capital murder charges because he shot a cop busting into his house late at night. Just two off the top of my head. I'm QUITE sure there are many more.
As far as drunk driving goes you made my point! The cost is much higher and the stigma of drunk driving is much greater than it used to be. It's NOT because they changed the law from 0.10 BAC to 0.08 BAC. All that draconian law does is to make it so practically anyone is drunk driving after a beer or two, regardless of how under the influence they are. It take the power to make your life a mess out of your hands and into a cops, who may or may not be on his own power trip.
I never said doing drugs was right, anymore than abusing alcohol, overeating, or not flossing. Just when is it justified for the feds to stick their nose into whos business? It's about freedom, baby.
The alternative to the war on drugs is to stimatize it. The gangsta culture would die if drugs were legal. Not immediately but it would die. Of course gangs would try to find other avenues for revenue, but they're also already doing those things. The gangs will just not be able to support the number of "employees" they currently have once the drug cash flow ends. They'll have to fire them and those fired would have to get real jobs. That's where a good peer pressure campaign would come in. Use peer pressure to embarass those who would otherwise be deadbeats into becoming responsible citizens, show them the respect that a 9-5er who earns an honest living gets for himself. Like you or me.
All this goes back to the whole Prohibition example. Even the main proponents of Prohibition were campaigning against it after a few years.