Really? I think that's just false. Very very occasionally, pedophiles will photograph kids in public to create a personal file of photos for their own sexual enjoyment. This, while repulsive, is not and ought not be a crime any more than any other 'thought crime'
Most of the incredibly rare cases of kidnapping by pedophiles are carried out by driving over to the nearest school and grabbing a kid.
This sort of thing is real, and when it happens it is terrible. But statistically speaking it's not a risk worth even bothering about. The parent who puts the kid in car and drives to school is putting the kid at orders of magnitude more risk of death or injury.
I have two girls, 2 and 5. So don't even bother with line of argument you're considering right now.