This is another matter that is purely subjective.
If one is a Christian and they still drink, does that mean anything except they drink? Does it mean that they are any less a Christian, or even that they are any less a person?
I don't think drinking in moderation (e.g. celebratory, social drinking) would mean that, but if someone is a downright drunkard and is the equivalent of a chain-smoker who drinks, then they really need to get help. Alcoholism is a deadly disease. It's like a plague... anybody who suffers from it will make everyone around them suffer from it as well.