I have to agree. Most guys who a prone to taking a physical approach to conflict resolution have probably had some martial training, boxing, wrestling, or the like. On the other hand it's probably pretty unlikely that you would come up against a high level practitioner just by chance. And, I wouldn't put a lot of stock in that whole "martial artists are too ethical and moral" to brawl. As on friend pointed out a very long time ago, there's no easier place to get in a fight than around the bathrooms at a big martial arts tournament.