I don't hold the bartender/host any more responsible for a drunk than I blame McDonalds for somebody's obesity. What about the sales of cases of beer? Is the grocer responsible for the dreck that downs a dozen and then gets behind the wheel? Or, is that guy responsible for himself - G*d forbid!
These are just lame excuses used by those that shirk responsibility for their own actions, and used by card carrying member of the Trial Lawyers Association trying to find a bigger pocket for their 40%. It's BS.