The family members that passed away due to alcohol, especially my grandparents, would never drink to the point where they got drunk. My grandfather in particular would just have a drink every night while watching the news, hardly what I would call "abuse," never the less, it killed him.

My point being, yes, it is going to do harm over time. Same with nicotine, but people love to ignore the obviously bad consequences, especially if they can continue doing something they enjoy. "It'll never happen to me..." <shaking head>