Just because someone drinks, smokes, does drugs, etc, does not mean they are a bad person. You hear people judge someone harshly because, lets say, they smoke. You don’t know who they really are, so don’t judge.
I have a friend, whose name is a secret, and he smokes pot. At first, I thought that just because he smoked, he was automatically a horrible person. That’s not true at all, he’s wonderful. He’s really funny, and a great friend. He has a horrible home life, which people have to think about.
If someone brags about drinking, or what not, think to yourself, What would make he/she do that to themselves?
There is a number of reasons, peer pressure, abuse, addiction, and depression. Others do it for fun. Why? Because of some TV shows, people around them, and parties.
Now, try to think, if you were in a situation (any situation involving drugs), would you be strong enough to refuse the drug? The person you are judgeing wasn’t strong enough. They just need help, not judgment.