You might have heard about it, but I still want to let those who haven't know what's happening. Some accounts are updating users permissions on the Bitshares exchange without the knowledge of the account holders. If you should make a mistake and approve such updates, you loose your account. Most likely, forever.
If you have a bitshares account, go to bts.ai/u/USERNAME (replace USERNAME with your bitshares username) and look at your active permissions. If it has anything than an alphanumeric characters, do change your password as soon as possible. If you see random-k.com as the active key, then changing your password is a matter of upmost importance.
It has emerged that this bitshares android app https://github.com/bitshares/bitshares_andriod_wallet was mainly the problem and if you have the app, you have to delete it. Yet to hear of someone crying they lost some funds but it's better to be on the safer side.