Thanks for your answers.

I actually expected that this was not officially possible and it's like 'try at your own risk'. I don't think I'll risk my miles then

sushibear, come on, lol, do you think I would try to fly with a different name? I am not James Bond or McGuyver, and none of the members of my family work for TSA

I meant like just regurlaly use my OnePass FF number on their names, because I've heard some FF programs allow like a single 'family account'. But that doesn't probably happen anymore in the major airlines...