There is, avoid being hacked in the first place.
Using 2FA makes it a whole lot more difficult.
Also if something sounds too good to be true it prop is. People simply dont do 300m giveaways.
Also better to not follow any link given ingame and if you have to, make sure its a valid forum link and NEVER input your credentials if you arent 200% sure that the website adress is correct.

To close any proposed measure you made would hinder normal players while only slightly inconvenience those swindlers.