Kneeling play, LB dives at QB

[biglaz]

This happened in a youth game earlier this season. A is up by 20+ points, the clock is running and A has to snap it once more with about 10 seconds left in the game. They have already kneeled twice. But on this play one of the linebackers, B22, decides he's going to dive through the gap next to the center as soon as the ball is snapped (the O-Line didn't do much to stop him). The QB immediately started to kneel after recieving the hand-to-hand snap. B22, amid his dive, makes helmet-to-helmet contact with the QB just before he completes the kneel, wraps up, and tackles him.

I know this is hard to see without being there, but what would you do? I didn't have the best angle from HL, but the R flagged him for a PF. Would you flag this? Would you consider ejection?