Wade,
8-2-F Note refers to the batter-runner. What gives?
I gotta go with your fellow umps if they are thinking of 8.7.J effect "...attempt to prevent a double play..." since running into the F4 (as described and my reading of the OP) does not meet my understanding of attempt:
1: to make an effort to do, accomplish, solve, or effect
Obviously, there has to be some type of thinking or thought (a decision) of I am going to do something to prevent a double play. I think this was absent from your description.
This leads to if you determine in a game that a runner has no idea what they are doing on the bases and they run into a fielder preventing a double play in your mind and you know they are clueless, .... hope that never happens. Sounds like rec ball to me.
Well maybe we can consider adding "action to prevent." What do you think Mike?
You got two outs, so way to go.
Ron