First column is year, second is our NCAA penalty rank third is our average penalty per game, fourth is opponent penalty rank, fifth opponent penalty per game average, sixth is difference:
2003 - 26 (5.8) / 7 (8.5) / -2.7
2004 - 47 (6.3) / 104 (5.5) / +.8
2005 - 84 (7.3) / 40 (7.1) / +.2
2006 - 38 (6.1) / 85 (6.2) / -.1
2007 - 64 (5.9) / 44 (6.1) / +.2
2008 - 90 (7.1) / 1 (9.1) / -2
2009 - 11 (4.4) / 46 (6.1) / -1.7
2010 - 48 (5.7) / 87 (5.5) / +.2
2011 - 94 (6.8) / 37 (6.5) / +.3
2012 - 88 (6.6) / 13 (7.2) / -.6
2013 - 116 (7.8) / 9 (7.6) / +.2
2014 - 117 (7.6) / 117 (4.4) / +3.2
2015 - 107 (7.2) / 47 (6.2) / +1
2016 - 40 (5.5) / 1 (8.5) / -3
2017 - 124 (8.2) / 86 (5.5) / +2.7
2018 - 84 (6.4) / 41 (6.5) / -.1
2019 - 112 (7.4) / 16 (7.3) / +.1
2020 - 129 (9.1) / 57 (6.1) / +3
2021 - 103 (7.1) / 43 (6.5) / +.6
This year - 53 (6) / 130 (2) / +4
Looking over history, ACC refs don't like us, and they really don't like us when we have a black guy as head coach.