Coming in to this one a bit late, but I agree that:
- There was no play, hence there can be no interference,
- The situation is not specifically covered in the rules,
- The offense should not benefit from this action, and
- Using 10-1 to apply 7-6P-S Exception, dead ball, no run, runner returns is the best/correct ruling.
But, it does occur to me that the interference / out ruling would probably be the call expected by both coaches!