Sam Storms has a tremendous study of Romans 14 online here. Here are couple o' quotes:

Christian liberty may legitimately manifest itself in abstinence or asceticism. Christian liberty includes the right to abstain from otherwise legitimate pursuits if one is convinced in his/her own mind that such is the will of God for them personally. In other words, you may fully believe in the truth of Rom. 14:14a, yet choose to abstain anyway. Christian liberty does not include the right to insist that others likewise abstain simply because you do. Far less does it include the right to judge them as sub-spiritual for choosing a different course of action from you.


If someone says to me: "Your drinking of wine is sin," should I cease? To answer the question we must first determine if the one who protests is a weaker brother. As we have seen, by weaker brother Paul is thinking of someone who not only has a misconception of what is inherently right and wrong, clean and unclean, but is actually himself induced or led to perform the action in question because of your participation. Paul is thinking of someone who is led to violate his own conscience because he is either untaught or excessively timid and fearful. His concern over your reaction to his abstinence leads him to do what his conscience forbids. This must be emphasized, because the person who protests your expression of liberty may be a legalist. Legalists are in no danger of violating their conscience! They are not in the least tempted to engage in the activity in question. Their aim is not simply to refrain from a specified activity, but to persuade you to refrain as well, often through intimidation, shame, guilt, etc. --Sam Storms