I have to disagree first of all that girl was smart letting one of the boys go to alert the neighbours was very smart move. As for you points about guns i think there didn't risk girl safety what happen if they accidental shot the girl or what if they had blow off the tyres and car flipped over crushing the girl?. Would any of them have guts to shoot him when a little girl as a hostage?.
The neighbours did the best they can to but there should block the the road.
JJ did a fantastic speech about mothers and Morgan had end it i suppose we knew he wanted Morgan to shoot him i kind of wish he didn't.