I don't wish to generalise as you have, but I think you have to bear in mind the addiction factor, some people are just addictive by nature and that one more bit of something, whether it be alcohol, smoking, gambling, retail therapy or drugs can in a lot (but admittedly not all) of cases lead to a reassurgance of the addiction. Hence, why many people recovering from their addiction will just stay away from it. My belief, it is possible, but with communion wine it is unlikely.