The sideline mattered to me is 1) it paints the picture for everyone, and 2) it's really hard to have much sympathy for any arguing that may have come from them for the second flag.
Perhaps the real reason I brought up the sideline was because their reaction to their kid getting ejected made me want to think about the whole string of events and get some opinions from others.
I'm beginning to come to the conclusion that if anything should have been done differently it would be a matter of personal form. As I said in the original post, the game was beginning to get chippy. After the kid got ejected the rest of the game was surprisingly civil.
(I'm not advocating ejecting players to control a game. NO WAY!! The kid got himself ejected by cursing at our referee)