[DaveASA/FED]

I think I would have said something to blue the first time I saw her blocking the base without the ball. That would have heightened his/her awareness of the situation and when it did matter it might have helped get the call right initially.

My suggestion is the first time you see her setup where it would have been OBS, just say something like "Blue can you watch how that f3 sets up please, I know my runner didn't react cause she moved so there is no OBS, but on a close play sure looks like there would be OBS" Also might add something about being worried about injury as there is no where for your runner to run and be able to contact the base without making contact. Again attitude is everything, never make that sound like your runner is going to plow F3 if she is there, or make them feel like you think they missed a call (that is why I mentioned saying "I know my runner didn't react so there is no OBS") another reason it is sometimes easier to plant the seed so to speak early when there is not an issue, rather than wait till someones ego might have them defending a call they have or haven't made.

Just another idea how to handle it