I'm a mechanical engineer with a professional interest in mechanics and materials science (I actually have my master's in materials engineering and metallurgy) and I'm involved in safety code testing and compliance in a different industry. I've always been pretty intrigued by ergonomics and biomechanics. I'm well aware of the forces that can be encountered in even a slow speed crash and that young children are at particular risk due less-developed musculoskeletal systems.
A friend and coworker of mine was killed instantly in a car accident which his wife survived almost uninjured (they had no children), and around the same time I found out that somehow SIL and BIL had misused their Keyfit for the first several months of our nephew's life. I came to the conclusion that when DH and I had children I would do
everything in my power to keep them safe in the car - that even if we were in a hideous accident and I died, my kid(s) would have a chance. I know it sounds morbid, but that's how I felt.
Then once we had our daughter I saw
so much misuse - I still see it. I was at the YMCA last week and parked next to brand new BMW with an ancient, weathered-looking shield booster in the back seat! The children in DD's daycare classroom range from 15-22 months and only three are still rear facing, including her, and at daycare pickup I've seen 2 year olds being buckled into HBBs. Last summer I went to a car seat check and was told by the CPST that my Boulevard was the first correctly-installed and -used seat they'd seen all day. It's scary.
I've found that people IRL tend to respect my opinions on car seat use a bit more because of what I do for a living. I want to be able to educate parents and to help my friends, family, and parents at daycare to have their kids riding more safely. I would like to take the CPST course but just need to find one that works with my schedule. I also think all of the cops and firefighters might think I'm some sort of nut.