Your reply to me says you are. They cannot check multiple people aren't playing at the same time unless they force that account to be signed in, meaning you need give other people your account details. Otherwise people could just sign out and play at the same time, since they said this is not possible, always online must be a requirement for the friends/family.
Your reply to me says your reading comprehension is subpar.
I'm going to put this really simply to you...If you can't understand this by the time I'm finshed, I'm done with this conversation.
On Xbox One, all your content is available in the cloud for access anytime, anywhere -- by you or by anyone you give you access to your gaming library. When you buy a game via retail on a disc, or if you buy it digitally via Xbox LIVE, it becomes available, instantly, in the cloud.
The only "account detail" necessary is for me to know someone's gamertag, and presumably that gamertag is already a part of my friend's list. Once I've setup my "Faimly" by adding gamertags from my friends list on Xbox LIVE, then Xbox LIVE knows who I've given access to my games. I may do this on my console, but Xbox LIVE has all the details.
Yes, anyone who is in my "family" accessing a game in my library, will need to be online and signed in with the gamertag (account) that's in my "family" list. This is all logical.
They do not need my account information and I do not need their account information. Their console won't be talking to my console at all, not unless we're Skyping, at which point then yes, you are correct, my console will absolutely, positively, 100% need to be online with me signed into it.
But as it stands, right now, if I'm not logged in, or some devastating act of nature wipes out my home and console, then anyone who I previously setup in my family list will still be in my family list and they will have access to my content.