Ada: wanja where are you going to in this ungodly hour of the night. Wanja; i am heading towards my usual joint to enjoy myself. Ada: which joint? Wanja: XY...

The most appropriate way to curtail Wanja's behavior is through re-orientation and rehabilitation. This involves helping Wanja understand the dangers and negative effects of his drug and alcohol use, and providing him with support and resources to overcome his addiction. It may involve counseling, therapy, and possibly medication-assisted treatment to help him achieve sobriety and build a healthier, more productive life. The focus should be on addressing the underlying issues that drive Wanja's behavior, rather than simply punishing him or trying to bribe him with expensive gifts or financial incentives. Ultimately, the goal should be to help Wanja become a responsible and respected member of society, rather than a danger to himself and others.