Screaming toddlers are no fun. I have one, at times. I would say that forcing a 3 year old into a seat isn't really all that 'easy'. I have tried forcing a 2 year old into his carseat on occasion, and found it much easier to let him calm down. Of course, there aren't 112 passengers in my car. Which is a good thing, as I have a Honda Civic.

Things like this are one of the reasons I don't go out much. You just can't "count" on a toddler to behave. We did fly in July, at 22 months, and he was a dream on the way out, but, spent alot of time kicking the seat ahead of him on the way home. Thankfully, it was a short flight.