If the passengers actually listened and read the safety card and accepted the 'one on one brief' the cabin crew do to the passengers on the over wing exist then its there own fault.
If you jump off the wing from the wing root it's not high at all, you can touch the flap on the walk around. All you have to do is FOLLOW the arrows on the wing which designate you where to walk, sit your fat/or drunk ass down and slide down the flap.
As usual it's a case of 'it won't happen to me'! The crew involved did exactly what the book said.
Well done to those involved.