The question appears to have arisen from a need to consciously address these kinds of conflicts. A foothills runner, Samantha Newbanks, said "Almost every time I go out, I'm going to get hit."
While there are currently discussions afloat in the trails community about how to best remediate conflicts, such as organizing the basic direction of foot, bike, and other traffic, it appears staying aware of others and letting go are key to a sane, smooth experience.
And standing around trying to prove how you're right appears to be not helpful. "You're better off just getting beyond each other and continuing on your way," said Dr. Dick Gardner, who helped organize the event.