Just a reminder: if you think that you responsible, strong willed gambler with firm grasp of reality and you will never get addicted because only weak people are addicts.
You are completely wrong: Addiction can be stronger that will of even the strongest human.
I've seen otherwise great and 'strong' and wealthy men engaged in irresponsible behaviors to maintain their addiction.
This is why if possible we need to avoid engaging in activities that could cause to us an addiction, when I see someone doing an activity like that and then says that they are doing it just for the fun the only thing I can think is that maybe the day will come when they are no longer doing it for fun.