Scot McKnight on the issue of alcohol (but it could apply to any issue):
It seems every year someone brings up the Bible and alcohol (the drinking kind)…What I find every year in this conversation is a serious, but repeated mistake. The tack is this: If I take a stand more “biblical than the Bible,” then I can’t be wrong. That is, if I choose not to drink at all, I will keep myself from sin and all appearance of evil and will be safe. This is what I call the sin of “zealotry” — the belief that if we are more extreme than the Bible, then we can’t be wrong. Wrong.
If God is God, and if God speaks to us in the Bible, then God spoke words that show that wine drinking is fine. One may choose not to drink, but that view is more extreme than what the Bible says. Drinking too much is contrary to the Bible, but not drinking at all is not what the Bible teaches (except for ascetic strands at time).
But, let’s not fall for the idea that being more biblical than the Bible is safe ground. Extremism is not righteousness; extremism is zealotry. Trust that what God says is what God wants. (Link)