I am so glad the parents changed their tune and the child is doing better. The Mexican food excuse followed by the concussion comment would have really bothered me though. As for the car seat I know some ppl who leave their kids in car seats far longer than they should and they actually do it on purpose because of "safety". I understand, and heck I had to do the same with my DS because he was tiny for his age, but there definitely comes a point where the child is obviously too big/ too long for their seat and they need to move up. Legs being squished or hanging out cannot be comfortable for the child. Not to mention that I personally could not wait for the kids to be forward facing so I could actually see them better and they also felt less "left out".

I totally get that you feel you are parenting the parents. It sucks when they just don't seem to have a clue overall.