I believe there is some disagreement as to what "wine" was in the Bible. Some people see wine as the fermented alcohol containing wine we see today. Others see wine as unfermented or fresh wine, which could be what we call grape juice or something close to it. There has been research on the definition of wine. Today it is seen as the fermented grape juice. As early as 40 years ago definitions of wine included fermented and unfermented grape juice as wine.
The Latin vinum as used in biblical texts also contains boiled wine and sweet wine as definitions, and both types are unfermented.
The Greek word oinos while believed by many to mean only fermented grape juice, is referred to by Aristotle... "though called wine, it has not the effect of wine, for it does taste like wine and does not intoxicate like ordinary wine". Paipas, a Christian Bishop of Hierapolis who lived close to the apostolic age said "vines will grow each with... ten thousand clusters on each twig, and ten thousand grapes in each cluster, and each grape when crushed will yield 25 jars of wine [oinos]." While he was talking about his thoughts on the millennium it is telling that the grapes only need crushed to get the wine.
I have more on the Hebrew Yayin as well as scriptural passages that could be explained if desired.
My second point has to do with the LDS Word of Wisdom.
Doctrine and Covenants 89:3
3 Given for a principle with promise, adapted to the capacity of the weak and the weakest of all saints, who are or can be called saints.
This is given for everyone, but with the weakest of all saints in mind.
This last point is in regards to Silencer's post.
Doctrine and Covenants 58:26
26 For behold, it is not meet that I should command in all things; for he that is acompelled in all things, the same is a bslothful and not a wise servant; wherefore he receiveth no reward.
Basically use your brains and judgement. Don't wait for a command to come down from the heavens before you stop doing something that is bad or bad for you. Don't wait for a prophet to tell you to do something good before you do it. Your brain is there for a reason, use it.