It's actually very easy to argue with the appointment strictly on a professional basis without even taking into consideration any personal failings he may have had with adultery. He has a very sordid professional history of being dishonest, undependable, and a back stabber. He tried to leave Louisville after a single season in 2003 and interviewed for the Auburn job without Louisville's knowledge and with Auburn doing the interview secretly, as well, despite Tommy Tuberville still being employed. He left the Atlanta Falcons 13 games into his first season to take the Arkansas job after having personally promised Arthur Blank 24 hours prior that he was not leaving; he did not inform his staff or players at all. He lied to his employer at Arkansas about the hiring process that he illegally circumvented in order to hire his mistress, a 25-year-old Arkansas athletic department staff member, to be his personal assistant; he also lied to them about his mistress having been on the motorcycle with him when he crashed and it was only when a state police report was leaked did Arkansas find out. He left jobs at Western Kentucky after a single season and Missouri State after two seasons, both times without informing his staff and players. He took the OC job at UNLV and held it for 3 weeks before taking the Texas A&M OC job.
In short, it's not his personal conduct that I find unappealing about him. Well, I guess that's not entirely true- I personally find his adultery to be morally unbecoming, but I have the ability to completely separate his personal life shortcomings when evaluating him professionally. His professional behavior alone should be enough to give any self-respecting school or program pause when hiring him. Not only that, but it is nearly a unanimous notion among virtually every player or staffer across all teams that have worked with him or played with him over the years that he is a slimeball.
Speaking strictly in terms of his work as an offensive schemer and playcaller, there's no question he's been really good at what he does over the course of his career. And clearly he is being hired by UNC for the sole explicit purpose of manufacturing more offense. I understand the *why* of his hiring. I just don't agree with the *how*, if that makes sense. What I mean by that is, I do not like the idea of someone like Bobby Petrino, who is universally known as one of the biggest scumbags in the industry, to be a representative of my alma mater and of the football program from which I hold varsity letters. I do not like the idea of adding someone who has a long and sordid track record of causing major cultural and internal problems almost everywhere he's been, to an already chaotic environment with clear culture issues. I don't think the juice is worth the squeeze.
Having said all of the above, I recognize that 1. my opinion is completely meaningless in the grand scheme, and 2. it's an opinion that is going to be held by a very, very, very small minority of our football fanbase. The majority of fans just want to win, without caring how the sausage is made, and they think that Bobby Petrino's offense is the shortest cut to being able to win. That's totally fine, and I don't begrudge anyone that mindset. It's just not the one that I am personally comfortable with. I care about character more than I care about winning. Winning is certainly important to me, but doing so with people who generally try to do it the right way is more so. I don't intend for that to be some haughty, sanctimonious, holier-than-thou statement- it's just how I personally feel, and I am comfortable with it, knowing that many others may disagree or differ.