Speaking from experience I used to drink and drive got caught and I'm glad they did because it taught me a lesson, even though I didn't hurt anyone the times I did it, you can be so incapable and not even realise it,now I wouldn't even consider getting in the car the day after or take my keys or car out with me, some cars can be a handful sober let alone drunk when your feeling invincible, I lost my job because of it.
This was when I was 20, (now 27) and the only thing Ive had on my licence, I took a drink driving rehabilitation course and had my 12month ban reduced to 9, learnt a little bit aswell.