Once a maintenance drinker graduates to the blackout stage, he or she is now beyond the clinically safe "cold-turkey" point.
Those who indulge heavily and then make a decision to abstain or even to try and quit and fall back can often, through will, stop altogether with constant abstention but the key word here is constant, the most dangerous stage for this type of person is the point where he goes public and begins to brag about his achievement for it is at this point that his will is most tested and needs reinforcement.