There are two things to address regarding your comment:
1. People also know the consequences of speeding, murder, cheating on their taxes, etc., yet they do it anyway. And I don't know what that has to do with my statement, but … since you brought it up:
2. You should check your facts. Drunk driving is actually way down.
http://responsibility.org/drunk-driving/drunk-driving-statistics
Fatalities from drunk driving are down 64% between 1982 and 2012. That's huge. MADD, a huge player in the alcohol discussion, was founded in 1980.
Guess those PSAs are really hitting home.
Ask bar and restaurant owners how much their alcohol business is down in the past 20 years.