Originally Posted by
whiteapplepie
I found this in steam support page
Will I be punished for any cheating or fraud conducted by other users while playing my games?
Your Family Sharing privileges may be revoked and your account may also be VAC banned if your library is used by others to conduct cheating or fraud. In addition, VAC-banned games cannot be shared. We recommend you only authorize familiar Steam Accounts and familiar computers you know to be secure. And as always, never give your password to anyone.
Any game with a VAC ban will not be able to be shared.