Everyone has the decision on how to spend his own bitcoin. We cant blame them if they fall on doing thigns that could possibly waste their hard earned bitcoin. Having leisure sometimes is good but dont play too much since it would surely lose all you money.
There's a good effect for those people who suffers lose while doing gambling or any kinds they spend it for nothing. Some person becoming a better person when it comes to a wise spending of their bitcoin after experiencing a devastating loss. That kind of person knows to control their self spending activity.
But there are still some people who hasn't learned from bad experience for God sake.