Interesting End to Game

[martynva]

High School game between rivals. Game tied 1-1, bottom of 7, Bases Loaded. Base hit to RF should end the game, but R3 does not touch home before running towards first base along with teammates from 3B dugout to congratulate BR. HP Umpire does not signal safe and remains standing behind the plate. After considerable delay, DC sees HP Umpire, realizes what must have happened and begins yelling "Get the ball". This warns both teams that the run has not yet scored. R3 beats def player with ball to HP in very close play. HP Umpire signals safe to end the game. DC asks why R3 is not out for "leaving the baseline". HP explains that only applies if runner is attempting to not be tagged. DC asks if runner is out because teammates have come on the field. HP answers "No". At this point both umpires leave the field. DC approaches HP in parking lot (in very courteous manner) and asks how to file post game protest. I suggest he ask his Athletic Director.

Any suggestions on how it might have been handed differently?

What if nobody notices that run has not scored? When do you call runner out for abandonment (upon entering the dugout)?

What if: instead of yelling for the ball, DC had "Appealed" to HP that runner was out for missing the base ?