opening pandora's box.
...which just happens to be full of suffocation and blunt force trauma.
The recent death on Berthoud Pass should serve as a cautionary tale to your (not-as-smart-as-you-give-them-credit-for) friends. Those riders were "sticking to the trees" and low angle terrain but traversed beneath a slope that ripped and ended up killing one them. The victim was found buried less than three feet deep. If they'd made smart choices, he'd still be alive.
Your friends think they are smarter than they are. There's nothing worse in the backcountry.