When an account is “hacked ”, it means that it has been compromised or rather, someone else besides you has access to your account and can make changes to it. This is actually phishing and does not mean that the ROBLOX site was compromised. Almost every single time an account is compromised, it is because the account owner did something (maybe by accident) that helped the "hacker" get access to their account. The weakest link in security if generally the human. That is why it's important to employ good security practices on ROBLOX and online.