In my experience, people who behave the way this fella did were probably raised by people or a person who did a lousy job of teaching manners and etiquette. Never developed any advanced social skills, so he goes with what he knows--bullying and intimidating.

Unfortunately, it is my firm belief that we are in for a lot more of this in the future, as people are so focused on their fb/instagram/snap-whatever that interactions with real, actual humans are totally of secondary importance. Social media is harming society's social skills. Instead of practicing those skills with living people, they are staring at their phones. It could get a lot worse.

Sorry you had to deal with this, but it sounds like you handled it like the adult you are.