Gambling with someone else's money is a very bad idea.
Gambling with your own money is a really bad idea except you just have so much and you are willing to give some out, let alone, gambling with someone else's money? That is a horrible thing to do. It is not just a bad idea but an extremely worst idea. It is more like loosing in 2 places. Loosing your soul due to addiction (cause that is the only reason I can picture someone doing something that crazy) and then going into more debt.
I think there are more far worser than that. Gambling with other else's money is like cheating hardcore on casinos just to win a lot of money, it will really hit your conscience. But the the worst of the worsest is when you commit a crime just to satisfy your addiction and have fun.