A major danger of intoxicants is that they can interfere with judgment, self-restraint, and the ability to make responsible decisions. Their effects may harm speech, conduct, property, and other people's rights.
The Qur'an instructs believers to avoid intoxicating wine:
فَاجْتَنِبُوهُ
So avoid it. (Surah al-Ma'idah 5:90)
If a person becomes quarrelsome, neglects important duties, or violates others' rights while intoxicated, the harm is not necessarily confined to that individual. Family members, friends, and the community may also suffer.
The expression جُمَاعُ الْإِثْمِ emphasizes how one harmful habit can become a cause of further wrongs. Protecting sound judgment, life, property, and people's rights is therefore an important moral responsibility.