look at alcohol... it fucks you up 10 times worse than pot does
look at all the alcoholics, people that are actually addicted to alcohol... you dont really get addicted to weed, you just do it because its good, its like if you discovered hamburgers for the first time, you would want to keep eating them because they are so good- your body does not chemically crave hamburgers
people get drunk and beat their wives, kill people, and run around naked... people smoke weed and mellow out, generally.
legalize marijuana, and then maybe, they could make it illegal to smoke while driving, like drinking and driving.
thats my 2 cents