mechmouse: You can use the account, but only 1 game will run, launching 2nd game will terminate the 1st
blotunga: Exactly. I can't for example play game A, while the kid plays game B. I'd have to re-buy game B on a separate account.
Unfortunately there a plenty of people like him who are adamant that Steam could never be at fault, and it does for the masses exactly what it doesn't.
To make matters worse, there is a bug which stops SFS and I guess steam in general terminating games.
But it is a bug, not intended design