For me gambling has very big problem when can't give up it and continuously losing money for very little hope after this i will get recover all my loses, yes that kind of thinking is very big problem and that is so many people think it is totally wrong.
And those who say that they gamble for fun are surely on the edge of getting addicted, because this gambling is only known to exist because people get addicted and hence loose, which makes the site in profit, so please quit it if you can not afford to play and pay.