What about people who go to offline casinos then? They seems to care little about privacy, as security cameras are all around. Or people who place bets using mobile while being on the sports event. They dont hide mobile screens, and with enough luck, anyone could observe what they do. Providers knows every time someone enters a gambling page.

When people try to keep their gambling habit as a secret, I think they do it because they are afraid of shy to give honest answer how much they have won or lost if they are asked. Otherwise I see no reason why to keep it in a secret. If someone asks me if I gamble, I would tell yes. If I find out or know that someone gambles, my attitude wont change a bit towards him. It is his business and adult can do everything he wants.