I tired to ignore it...for a long time, at least half of the ride. Then when the yelling tantrum was constant for about 5 minutes, I couldn't keep my mouth shut. I didn't yell at her, but I did have a "tone". The person that said it's not her fault wasn't close to her so I'm guessing it was just a stranger excusing the behavior. At one point the kid was mad because she couldn't unlock the phone, tantrum ensued, then another time mom took the phone, tantrum ensued, and I'm not even sure what prompted the tantrum that finally broke me. I really think these were just badly behaved children with a mom that can't control them so she gave up. Do I feel bad for saying something? No. No matter the ability of children, the parents have a responsibility to the public to at least try to gain some sort of control over them. That did not happen in this case.