Well, this certainly wasn't the 'Godly' way to conduct one's self. A better approach would have been to hold his head high and not allow this scum bag's words to affect him.
But I'm not going to condemn the young man for his actions. That word is bound to incite the worst in all of us. I'll be willing to bet there will be many amongst us that will be ready to condemn him, though, which is ultimately why this was a bad decision on the part of Smart. Right or wrong, this will likely be a 'red flag'.
I do not however buy the nonsense that being a paying fan entitles one's self to hide behind that fact, and say whatever you want without fear of repercussions, possibly even physical. If you don't want your teeth knocked out, well, shut your [dang] mouth.