The Duke-North Carolina rivalry is one of the most heated in all of college sports, whether it’s on the hardwood or the gridiron. The two rivals got to settle the score again on Saturday, as the Tar Heels jumped out to a 20-0 lead on Duke in the third quarter. Then, the Blue Devils stormed back, rattling off 21 unanswered points for a classic 21-20 victory. The ending will only add yet another chapter to the rivalry. And on Saturday night, it shouldn’t be any surprise that the Duke football social media team trolled the Tar Heels on Twitter. They clicked the Report Account button. And then typ…