A little help with digital games.

Hi guys!

i don't own a ps4 myself, so i cant help my friend.

Recently, his son traveled in secrecy with his GF and pissed off his whole family for a few days, because he was "missing".

He took his PS4 with him, which is his, but the account with all digital games belong to his father.

How can he disconect remotely and block all his access from the library, if he wishes? Not permanently nor that "every 6 months" thing that Sony offers.

Just a remote disconect, keeping the digital games away from him.