Automatic Obstruction?

[SC Ump]

My understanding has always been that the runner must actually be impeded for obstruction to be ruled. Positioning is only important in relation to the runner and her attempt to advance or retreat.

I agree with your call in the original play. Obstruction should not be ruled if the runner was not "obstructed".

That being said, if the interpretations of a particular organization differs from that of "standard" rulings, I feel those interpretations need to be followed. For clear understanding, I would suggest these abnormal interpretations be in writing.