At least my team is good for a giggle and some case studies..

[More Cowbell]

If the "new" runner on third had scored during the botched extraneous rundown, would the run count? (Hypothetical, but it would have been a heck of a way to lose the game, especially since it was the first successful "bring the infield in" play at home we had in three years.)

The umpire was, I believe, a first year kid--who called a pretty good game--and he did signal out, but no further emphatic utterances.

The age part and potential injury issues are germane to the discussion. At some point, I suppose, they need to be pushed off the high dive. Our catcher just started playing, and he really loves to catch (our starter caught four innings prior), and the kid just didn't know what to do once he saw the runner still running and retreating.