I don't think gambling should be called a addiction it's not something bad or horrible as it's always is portrayed. Not all our alike, not even our fingers are the same size, each one finds a different passion which keeps him sane so I would call it a passion, i believe each person is sane enough to decide for himself, and so I feel each one can make his own choice without being subject to humiliation.
Gambling becomes an addiction whenever people tends to overdo it and that is when they start to spend all their money and time gambling instead of doing other important things. Gambling in itself is no problem but when it becomes extreme and addiction there is when the problem begins.