Yes, AR-10s might have an adverse effect on a pushy elder, but I've been told when it comes to JWs and blood that it's not unusual for church authorities to show up not only to counsel the members and act as go-betweens. One fiend who worked emergency rooms I a metropolitan area said that if they could get to the members or the parents before the church leaders, they could usually influence them in the right direction. But once the church guys showed up, it was a different ball of wax.
The staff would do everything they could to separate the parents or patients from the church authorities while the doctors counseled them, and they'd also bring in chaplains to try to explain why the JW biblical exegesis was not only wrong, but destructive.
Members who needed blood were more likely to sacrifice their own lives than those who had children who needed blood. And apparently JW parents who lost children that could have been saved were more likely to be divorced in the painful months that followed. So yes, it's a topic that interests me.
My friend said he never had a case where the father wanted to save a child and the mother wanted to let it die. If the father was for blood transfusion, the mother always went with it. Once the elders, or whoever, arrived on the scene it was another story. They did everything they could to keep the doctors and other medical staff at bay, and as for the chaplains, it was get em outta here! There's the door!
Nice guys.