Thread:Duplicates13/@comment-31827142-20170609201958/@comment-4196050-20170609203727

Change your password. Don't input your login information into anything but roblox.com (those free ROBUX websites and "maintenance" GUIs are scams to get your login info). Make sure you log out of ROBLOX when you're playing on a computer/phone that isn't yours.

According to ROBLOX's Terms of Use, you're liable for any actions on your account (whether it's you who do it or if your account is compromised). Take this as a warning to use a strong password (Password​ or your ROBLOX username are bad passwords), enable 2-factor authentication, and take other steps to avoid having your login information divulged.