Safety?

At the grocery today I saw a person driving a minivan while talking on a cell phone, which is a forgivable offence. However, I also saw a infant car seat in the front passenger seat. I did a quick glance and saw that there were unoccupied seats in the back as well as noting that the seat belt for the front seat was dangling and not at the very least securing that seat. What I didn't notice was if there wasn't an actual baby in that seat. Soo I let it go.