Serious question. At what point is it an airlines responsibility vs. the FAA? I mean, private planes aren't required to do this. Then there are the shared (I fo

Serious question. At what point is it an airlines responsibility vs. the FAA? I mean, private planes aren't required to do this. Then there are the shared (I forget the name) private plane companies where lots of people are in a pool of users of the planes. Where is the line between private plane, where the pilot/owner decides the risk, and public airline and FAA decide the risk? We need some sanity somewhere.