I agree that this is very bad and in no way condone drinking and driving, but if a guy gets done for having a pint and a half and gets punished once - well we all make mistakes sometimes, to punish someone for there entire life in this way is a little sad. Of course if they offend again then it shows signs of a problem.
I was an instructor in the states with a great guy, no drink problems, no drug problems, a great pilot. However one night he had a few drinks at a party and drove home. He got stopped and convicted. I can assure you it was a one off, a big mistake, and something he hadn't done before or since. The next month he got hired by American Eagle despite disclosing his conviction - and from then on he's been progressing up the ladder in that airline - and bloody good luck to him.
I presume from some of the replies above that no one has any speeding convictions, parking violations etc and of course no one has ever driven with more than a sherry trifle and half a wine gum down their necks.
Again I am in no way condoning this in any way just trying to look at slightly different perspectives.