The picture came from consumptionjunction.com which is not safe for work.
Actually there are a number of ways around the seat belt issue and have all been used to save prom dresses from wrinkles and dirt.
Given the severity of the damage it would probably not have returned to the position in the picture if it had been in the in use position whether the belt was around or behind her. So the picture was staged or the belt was disabled. Or neither. Or both.
Anywho...I believe it's a legitimate illustration of the consequences of not using belts. Got your attention, didn't it. Hope it got Russoto's
