Continuation of Scoring Play

[Rickwill]

hey, I know its sometimes difficult to answer the "why" question, but I'm going tojump in anyways..... If a ball carrier is flagged for unsportsmanlike conduct on the field of play during a run. and then after the flag is thrown, he continues running down the field and then into the end zone. why do the rules allow the touchdown, even though the ball carrier committed the infraction during the play and before the touchdown? And is this the only penalty in the books where an offensive player can commit a penalty before the touchdown is scored, yet the touchdown counts anyway? thanks.