This site is safe apart from scammers who may try to take your hard-earned money.
By reading this, you should agree that you will NOT abuse this help to scam people.
Also, you may view this on the original website in their own words.
Here are types of common scams from old and new habbo.
1. The 'Tell me your password and log off' Scam.
Example_1: Hey!
Example_2: What's up?
Example_1: An Administrator gave me a tool that can hack for more furni and coins, want me to try it on you?
Example_2: Sure!
Example_1: Give me your password and I can hack it for you, but you must log off for ten minutes.
Example_2: Okay then, examplepass.
Example_2 logs off.
Example_1 goes in to their account and takes the furni and coins and changes the player's looks to the Habbo Raiders...
Example_2 logs back on to find a shock, their account may have been banned or just empty.
A funny trick is to give them a fake password.
2. Ctrl+M
Example_1: Hey!
Example_2: Hey!
Example_3: Hey!
Example_2: Want to get a lot of furni and money?
Example_1: Sure!
Example_2: Type your password but DON'T press enter!
Example_1: Okay...
Example_2: Then press CTRL+M
Example_3: fakeexamplepassm
Example_3: WOW! I GOT SO MUCH MONEY! OMG MY FURNI! :D TY TY TY!
Example_1: examplepass2
Example_2 now bans Example_1 from the room and logs on to his account and takes his stuff.
3. Password Censor
Example_2: ************
Example_3: ************
Example_4: ************
Example_1: Stop spamming you fools!
Example_2: No no no! Habbo censors your password, look!
Example_2: ************
Example_1: Wow! Really? But why would I do that?
Example_3: If you do this, you will get some money as well!
Example_4: I'm so rich!
Example_2: But be warned, only put your password like it's meant to be, otherwise you see it come out and we don't want people hacking in to your account!
Example_1: examplepass5
Example_1: OH MY GOD! I AM REPORTING YOU!
But before they can be reported directly, they all log off, including the accomplices.
Those are the top 3 scams I've heard of.