Taking a knee

[archangel]

8th grade game, visiting team has the ball with 9 sec left in the game, up by 7, and say they will take a knee. Defense is informed, and crew "pinches" in to watch the last play. On the snap, the nose guard dives under the center, trying to knock the ball loose, but the QB, holding the ball, takes a knee, game over.

R tells home coach as we are walking off the field that Unsportsmanlike Conduct could've been called on the noseguard, even though there was minimal contact and no encroachment.

I believe that since the ball is live on the snap, the defense could recover a fumble, assuming the defense did nothing illegal, and therefore what the noseguard tried is OK...keeping all players safety in mind.
Comments?