The Health and Safety brigade are having a field day here. Somewhat over the top methinks. Some idiot was very stupid and needs to get a very hard time, but time will tell on that one.
We have no idea if the kid was injured.
We have no idea how the offender, the Fullerians coach and other parents reacted.
The incident needs to be properly formally recorded by the ref and the coaches, the identity of the assailant established, witnesses ids established and all parties asked to take notes and be ready to provide a statement. If the subsequent behaviour is all civilised and the assailant is remorseful then let procedure take its course. restart and allow the poor kids to continue their fun. If it gets ugly, judgement call.
Simon yes an assault on a child has taken place and needs to be reported, the Club Safeguarding officer needs to be informed (but may well not be on site). I see no reason to ruin the game because of one idiots stupid action. As the ref - record it - Establish the offended coach and parents wishes with regard to taking formal or other action. remove the offender from the sidelines. (under citizens arrest if necessary)
I have seen the same problem occur, we handled it, we also recently had a parent on the FOP screaming at a child who had stupidly fouled his child. Calm it down, record it, ensure the right club authorities are being summonsed, and continue, don't blow the stupidity of one parent out of all propotion.
In terms of the game, if it was going to be a try - dead cert - PT given, else a penalty in my view would reset the game to the scene before the trip, if there was massive defence in the way of a try ..... scrum down.
If the guy is injured the situation is somewhat different.
Sideropes - guys grow up, there are thousands of school, mini and youth games in England every week without any sideropes. They are a great idea, but you need a lot of space, which we don't all have. Also some of these steel spikes increase the danger! Sideropes for every game of rugby in the country - I do hope not - for u16 formal matches - that is a good aspiration - I think about u15s is where the crowd and the kids become a real danger to each other, in terms of speed, momentum etc. so maybe start sideropes at u13, but it will be a while before it happens at every game.
A friend of mine who had his shoulder torn to bits as a spectator by two large fast moving u16s in Leics would confirm that the 2m safety zone is a good idea and so are sideropes!!! Serious surgery followed!