1. Dont click and browse non recognized site to avoid phishing.
2.. Always ask first the people on this forum whether the site is legit or not.
3. Dont put too much money on that site so if ever its really a scam, the amount it can get is minimal.
4. If it looks really legit, try some few games with few bets at first.
Being cautious costs less than not being aware at all. Dont let our greediness and dumbness takes over our financial life. Be safe people.
How ignorant is your friend, he got scammed yet he can remember the site? If this is true then he can still be scammed in the future because of his ignorance.