I only drove a couple of times whilst very drunk, thankfully no harm done and it was a very long time ago. Maybe on occasion I have been slightly over the limit but thats because my 1 drink might have gone to my head, I will only ever have 1 drink before hopping in a car, I won't even drive to shop down the road to get booze, its either walk or don't get anymore.. Thankfully this is not an issue for me and it doesn't matter how much I drink that switch never flips..