Do you really want to hire an aircraft like a Chieftain out only to have some dick cranium run it lean as ****e in order to pay less for fuel?
Done that before have you?
you assume that either no body knows how to fly the thing or they are all trying to wreck it for everyone else.
They break it, nobody else will ever use it again.
Not everyone is out to screw the plane over
we have ways of finding out things like that IF someone was stupid enough to do that.