I'm all for following rules...., but...
Seriously.
Is driving at 20km/hr with a small child on your lap really so dangerous?
Yes, yes, the law, the force and the airbag, the surprises etc. etc.. but what are the chances?
At 20 km/hr? In the KNP where there is about 5 cars/km.. (or is it less?)
I've driven many hundreds (thousands?) of kms in the KNP and were only surprised once by one elephant while going 50km/hr trying to make it back to camp before gate closure...and did not come close to hitting it (it was rather a surprise to get past an ellie in the road that quickly though...

).
At 20 km/hr the surprises are much fewer... and, dare I say it, less serious.
(Not to mention in comparison with the city with, what, a few hundred cars/km at 60+ km/hr... in this situation, yes, the child must be in a car seat... but in the KNP at 20km/hr?)
Personally, I would not drive with a child on my lap because it is hot enough already in the lowveld -- don't need a 3-year old "heater" on my lap as well...
We're getting too overprotective people!
I'm fairly sure most people on this forum older than 30 years grew up with no baby seats and no seat belts until they were old (and tall) enough not to be be-headed by the seat belt!
And all of us are here to discuss the issue on the forums.
So. Let the child live a little!
I'm sure it's little fun doing all of the game watching out of the back seat while strapped into a safety seat!
I'll continue to drive without seat belts on in the KNP. (Unless I spot a traffic officer in time to quickly put it on in any case

--
I wonder, do they also hide behind the bushes in the KNP, just like in Pretoria?

)
In my opinion, the more serious offence in the situation was the Fortuner going 80km/hr!

Putting animals and other road users at risk!