Interference - Did I Get It Right?

[Manny A]

Originally Posted by bsnalex

ISF Rules, Adult Rec Tournament this weekend.
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I call dead ball, and call R2 out. The rules state if the interference is an obvious attempt to break up a double play, the immediate succeeding runner will be called out. The conflicting argument I was replaying in my mind shortly after is no, this was not an obvious attempt, but F5 never had the chance to even cock his arm back.

I don't know ISF rules, but why go with the "obvious attempt to break up a double play" rule on this one? Isn't there an ISF rule on interference by a retired runner, like there is in most other sanctioning rule sets? In ASA, it's rule 8-7P, and the out would be called on the runner closest to home, so you'd get the same result without having to consider the "obvious attempt" criterion.