I fault Kid Once's parents, to a great extent, for what happened in that race when he was 12.
He was obviously an excellent runner who could keep up with the adults, and should have been allowed on the front line.
Most kids are not.
So, yes, it is understandable that the RD would assume that this boy didn't belong on the front line, and would move him. And since children generally overestimate their skill level, it makes sense that the RD would not take Kid Once's word for it, when he tried to tell the RD that he could do the race as fast as he claimed he could do it.
But where was Kid Once's parents in all of this?
Whereas the RD would have a hard time taking a 12 year old boy's word for it, the RD probably WOULD have listened to his parents - especially if his parents approached the RD BEFORE the runners stepped up to the mat.
I saw this happen in the same race I wrote about on page 1. We had a nine year old boy who is generally regarded as one of the top -- if not the top -- elementary school runner in the state of Tennessee. That kid is FAST! He outran almost every adult out there.
But the RD knew about him ahead of time.
In this elementary school 5k (Running of the Rams, Bartlett, TN, 2016) they actually put the children in their own separate corral, and started the kids after the adult corral was well on their way.
But not this speedy 9 year old. HE was placed on the front row by the RD himself.
RDs can do this, if they are made aware of the special skills that a child might bring to the race.
It would have been a good thing for Kid Once's parents to talk to the RD beforehand, and let him/her know what Kid Once's average 5K time ran.
In all probability, he would have been welcomed on the front line, if somebody (other than Kid Once himself) had told the RD about the child running prodigy.