Definitions, my friend, definitions. First of all -- See what the rule states:
Players shall not stand or leave their equipment where interference with a disc in play may occur. A player may require other players to move themselves or their equipment if either could interfere with the throw.
In this context the word may is talking about "in the future." Reading this in appropriate contextual English means, that before any throw you cannot stand or leave your stuff or have had stood or have had left your stuff where it might possibly "interfere" with a disc in flight. That simple statement means someone in the group has to have an idea (again, before the throw) of where this might happen. If some crazy ricochet or rollaway, etc., happens and the player doesn't move, I just don't see how he/she can be penalized for doing so. Again, like Chuck, I'm not saying they should or shouldn't or that there's anything wrong with moving, but I don't see how they get penalized for not doing so.
Think about it -- that's the only consistent response. Say there's a situation where a course has a lot of slanted or runaway greens with OB nearby (btw, not the best design IMO). One time the thrower putts, clangs, and it starts rolling back at him/her near the OB. He/she stands still and the putt hits him but still goes OB (violation?) or doesn't go OB (violation?). On the next hole he ends up in a simialr situation. This time he clangs, it rolls, and he attempts to jump out of the way of the rolling disc because he ascribes to the Atrain theory of "I'm gonna get penalized or called for a violation if I don't." So he jumps and tries to get out of the way and the disc stays safe (violation?) or goes OB (violation??) or worse -- earnestly jumps trying to avoid it but is kinda lacking coord, so the disc hits him and deflects safe (violation?) or even worse -- jumps (earnestly) and lacking coord, still accidentally hits/deflects the rolling disc keeping it safe, while two members of the group protest that the disc wasn't gonna hit him anyway, and that he jumped for no reason (violation???). I don't know what the people on my card are gonna say if I jump or try to scurry out of the way at the last second then I still deflect it. Simple solution. If no one has told you to move before the shot, then remaining still should be at least one option which assures you of no penalty.
I do believe Chuck is correct in his interpretation, albeit that is, in this case somewhat incomplete. Someone can ask the player(s) to move themselves or their equipment before the throw. After the throw, it's at least as likely on many scenarios of getting hit/changing the direction of a disc while moving out of the way just as much as standing still. I DO NOT see how this rule would require or even allow or a penalty for "not moving" during the flight/roll/ricochet/whatever of the disc, assuming the player wasn't doing something intentional other than standing at the time of the throw.
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