We have 2 cars but since I'm a SAHM, we rarely ever need to take the carseats out of my car for my husband to use. But we do need back up seats. We had an emergency last week and my dad let my 2 year old ride in the front seat 1 block to the park after he picked him up from school! I about died when I found out. He didn't see what the harm was since DS1 wore his seat belt, he drove less than 10 miles an hour and they only went 1 block. Seriously?
They also think the whole car seat expiring thing is a marketing ploy to get us to buy more baby stuff...this is coming from my dad who has an engineering degree! I just remind them they had their chance to raise me and now it is my turn and I get to do it how best see fit.