Can good people do illegal things?

I have been a panel member (jury member) for a special court martial these last 2 days. One of the qualifying questions that the judge asked us was "can a good person do illegal things?" It took a while for some of the other members to think about. For me it was fairly easy. Is some one bad just because they go 5 miles over the speed limit? Back in the 50s and 60s was a person bad for going against laws that were discriminatory against other races? The answer to both of these questions is no. Some of the juror members were adamant that a good person could not do illegal things. Interesting.