When they get aggressive it means they are in the most severe case of their disease and they should immediately recover in a rehab center,they should be forced by family members to go there in order for them to recover from such a bad illness.
It is true that these kind of gamblers always have the money to do so and I know a story of a friend of mine that he together with his brother were playing sport betting during all day and spent all the money they had even those to get meals and food to eat but some other fellow gamblers gave them like 10 dollar tips in support to them and that is the only good from gambling I think,people who gamble show empathy,we can see it even in online websites,in big casinos where in their chat people are tipping each other.