I wonder how much an individual payout will be reduced if it is shown that passengers did have their seat belts fastened while seated as recommended.
Is that what you meant to type?
Surely if you did have your seatbelt on as recommended then you are complying with a safety directive. If you are then injured that would increase the size of the payout.
If you did not have your seatbelt on then I agree that it would probably decrease the size of the settlement.