Trying to steal other players' account data:
Stealing another player's account or personal data or hacking an account is actually a real life crime and can lead to an investigation by the police if the original owner of the account decides to report it to them.
Apart from this, any attempt to steal a player's account or personal data such as spreading links in the game or on the website meant to trick other players into downloading a keylogger will lead to a long account banishment or even to the deletion of your account. If you should coincidentally get access to another player's account, e.g. because he treats his account data carelessly, you are required not to abuse this knowledge but should inform that player to secure his account.