The guy was around his mid-40s, maybe early 50s I believe, and he had kids in high school I believe. Real tough to lose someone that young.
Anyway, I think it's a cool deal because it gets the crowd involved. There really isn't such thing as a "cool" baseball cheer. I think anything that gets your crowd into the game and anything that might get in the opposing team's head is a good thing.
That guy had some pipes on him though. You could hear him clearly in right field 500 ft. away from his seats when he really got going.