In essence, I agree, but I can assure you I'm not even remotely approaching drunk, on a pint and half of beer (often just one pint), with a stomach full of food. Bear in mind that I'm a big guy (6ft 2 and 15 stone).
And I always test myself with a personal breathalyser, which I keep in the car's glove compartment. If I was ever over the limit, or for some reason didn't feel capable of driving home, I'd leave the car in the pub car park and take a taxi home, as like you, I feel very strongly about drunk driving!
Marco.