Recently I was around a physical bet shop close to my area and I observed a man who was shabbily dressed walking in the gambling house. I got into the place to observe what his intentions were. He walked straight to the gaming attendant, placed his bets in a highly coordinated manner and quietly walked out of the physical gambling house. From the way he was well organized, you will never know that he was mentally unsound apart from his dirty clothes and unkept hair and beard.
When I inquired from the attendant, she said he was a regular customer and that he usually raised money for gambling through the manual jobs he does around the area. She also told me that he has never misbehaved and acted violently in the gambling house so she was comfortable with him.
My question now is are there any moral, ethical or legal obligation to bar a person from gambling after physically observing that he is mentally unstable?
A man can never be judged by his clothes or outer appearance. Because outer appearance and inner both are not the same. There are many people in gambling who seem normal but they can be bigger gamblers than other normal gamblers. I think that a gambler, regardless of his appearance, nature or dress, if he behaves decently in a particular house and conducts gambling well, then he must be a good gambler. Moreover, any gambler will get permission everywhere if he does not cause any harm to others. In my sense I know that gambler will be allowed to gamble everywhere. The main point is that whatever the gambler does in general, if he does not harm others, he must not be restricted by any law in the world.