Roblox scam

Here's what happened: When my friend and I were playing "Rivals," a scam occurred (at that time he had 52,000 Robux). My friend had been saving money for several years and finally saved enough to buy 70,000 Robux, and I know him in real life. Many people added him as a friend just to beg for a few thousand Robux. Then, a user named "Jack Boi 999" appeared and begged him for 1,000 Robux. My friend wanted to have exactly 50,000 Robux left in his account, so he gave that guy 2,000 Robux. However, that guy hacked into the transaction system and altered the transaction, stealing 10,000 Robux! My friend ended up with only 40,000 Robux. He immediately quit the game and regretted giving Robux to that guy. Since then, he has refused to give Robux to anyone.