I'd be surprised if kids aren't getting run over forwards as well with SUVs, as they are just so high off the ground. My grandfather's Lexus LX is hellish to park because you can't see anything around the car's hood.
I think cameras are great for people that end up driving around kids a lot (I know a pool repairman that does a lot of work for schools, he has 3 cameras on his pickup, and still does a walk-around before getting in to drive), and opt to have them fitted. If all cars had them, I doubt most people would look at all.
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