Ooh, I did this a few times with my baby. So glad I have switched to wearing her in a pouch now when shopping. Scary. Prayers up for that mom. Some car seats kind of snap in and some really just hover there. You have to keep your hand on it at all times. Better get some form of baby carrier and wear your baby.
I always carried my babies in slings in public. It keeps them close to you and it keeps strangers from trying to touch them. I never could carry around those heavy carseats with the baby inside. ‘Baby wearing’ is the best!