Ken, please note that the fact "a guy fell asleep and was overlooked" is a fact and certainly not an opion. Crew members are responsable for the safety of passengers and not for passengers in general and there might even be a clause "during flight". Its the responsability of the passengers to follow instruction given by the flight crew. You could wonder whether sleeping in a dark aircraft is really an unsafe situation and whether the passenger has ignored the instruction to leave the aircraft.......
The legal system at your side of the pond is quite different than at this side. Therefore I expect the guy will try to make some bucks out of it.
But that was not my message. In my opinion we are holding others far too easy responsable for things we could have avoided. And as often things are blown up to huge proportions by using the "yes, but what if" principle.
In the end the guy had a free nap! He was definitely not RYAN-Air otherwise he would have been charged for it!
Cheers,
Huub