[pscook]

To qualify my answer, and to tag onto Jeff's great comment, I always fall back on the skiers credo and the track day mantra:
"It is the passing rider's responsibility to make a safe pass."

If you are passing a stuck rider, you are to blame for the incident. You should take care and caution when passing, especially a stuck rider. If you were hit due to being stuck, and you were just sitting there and not all over the trail or doing anything weird, then it is their fault.

But, it's racing. Not racing? Then it's avoidable, unless you did something stupid.