Precisely, there are always different opinions regarding to how people accept things regarding to your gambling participation, and regarding to that there's also differences in terms of how a person respect someone's privacy, though we know by a fact that most of the time negative impressions coming from other people around us always take place when they learn about your gambling participation,.
Either you are just doing it for entertainment or you are seriously taking it for money. It's up to you if you wanted to share or you want to take it secretly.
When we are doing something that we know is not incorrect or immoral but that we know other people may consider it to be the case then it is better to keep it a secret, as if you tell someone about the fact that you gamble and then that person tells to someone else you could easily end up facing some issues you never wanted to face with that person, however slowly but surely those outdated ideas against gambling are being left behind as gambling becomes more popular.