Man, how long do you think old wristbands has been waiting for his one shining moment? If I were a betting man I would place a wager that he's stained many-a-bedsheet just dreaming of the day he would get to hop on camera and kick a fan out for interference. You see the hitch in that giddy-up? It's almost like he spent the middle of every prior inning stretching in case someone got a little too anxious in search of a wayward grounder. Those oblivious fans probably thought he was rocking that long sleeve 'Under Armour' in case it got a bit chilly in Atlanta during a random night in late May. Nope. He just wanted maximize the sweat absorption after undoubtedly working himself into a lather enforcing stadium rules.
As far as taking the ball from an ecstatic kid is concerned, I can't even really blame him. Sure, he looked like a hard ass tracking down a souvenir that was obtained by illegal means and ruining a kid's night, but I'm pretty sure he only did so because he wanted to put it in a plastic holster atop his mantle to commemorate a job well down. From here on out that ball will be considered his lucky ball, if only because it was a result of preparation finally meeting opportunity.
Oh, and also, he's a loser.