When a gambler is addicted to gambling, he's not just a threat his personal life and future but also a threat to everyone around him including family members. An addicted gambler is very ready to to anything that'll provide him the money to continue his gambling including stealing and other illicit activities that are condemnable by the general society. That's it's very important to notify anyone who wants venture in to gambling to leave how to gamble responsibly or leave anything that has to do with gambling.
I have a family who is addicted to drugs but I think they have the same principle because, in my observations, they are willing to sacrifice anybody just to fill their needs because they don't really care about anyone anymore as long as they get the means to do their addictions. Just like the story I always relate concerning this topic, when our neighbor befriended a gambling addict, they won't give him peace because whenever he loses all the money from playing cards, he goes to ask for money from them even in the middle of the night where everyone is sleeping and this is a real story because I witnessed it myself. this is how mad they are and they cannot just simply stop whenever they want.