Art;
I'm making a big assumption here, but are you thinking of the guys who somehow manage to do it without any form of ground assistance, lighting etc in fog, rain and plagues of frogs and pestilence? If so you are not alone.
The procedures for this type of work are of necessity tight. I'd rather lose a customer to another operator than a colleague or aircraft through pushing a marginal situation. Someone on here recently wrote that the customer being dead lasts a lot longer than him being inconvenienced, I'd love to have that as the first paragraph of our charter agreement!
SND