This is not meant to sound harsh ..but probably will . It's meant to accept human nature . Humans judge each other every minute of the day . Even the ones that say they are non judgemental ...are , you just have to find what they "deem" as being unacceptable behaviour .
When it comes to "certain" drugs which society promotes as being "evil" then people will judge those who use them as being lesser for it . They have been trained by society with the campaigns ( quite rightly ) warning against them . Then if the individual using those drugs admits they can no longer function normally and will need some form of assistance . Then there will always be people who see them as a burden on society ( or family/friends) , therefore a lesser person , which they can feel superior to .
That's just life .
At least in our societies there is assistance people can turn to if they need it ..even if they are judged by others . There's plenty of other societies where you just get to die under a bridge .