By hacking if you mean losing your master password, then there is other things that can happen and some are very stealth.

• If you somehow post your ACTIVE PRIVATE key then, anyone can take your STEEM and SBD, thats not all they can set vesting withdrawal route to their account. So when you power down your STEEM POWER, they will receive liquid STEEM. This is a very small transaction and you may miss this if you do not check your activities often.

• In addition to previous point, one can update your account authorities with their account, so if you change password those won't be removed and they will have continuous access.

• Get blacklisted by SteemCleaners and Co., though you have to be very bad to be blacklisted. But if you are your Steem life will feel like hell.