Oh heck yeah...he was out of there as fast as he could drag that spoiled rotten spawn... This was not the owners fault, tho I personally would have 'escorted' that child out of the area SO fast, nor was it entirely the child's fault...it was the parent's. Anyone who takes a child they KNOW to be violent (and it is believed this guy knew from what he was heard to say) out where there are animals, not just reptiles, is totally accountable for what that child does.
I agree the owner should have called for someone to stop and hold those two to get some sort of report filed or payment from them. I also agree that that kid should be forced to pay for what he did...maybe by cleaning cages or some sort of service under heavy supervision.
All in all this was a HORRID act that could have been prevented on many fronts...