Superman could just crush coal into diamonds and put those thugs at DeBeers out of business. Then again an influx of "Super Diamonds" would likely lower the value of diamonds overall.
Assholery, sadly, knows no geographical boundaries, especially when sports are involved. A simple Google search will show you that boorishness isn't bound by any state or city borders in this country or abroad. Philly has a mostly deserved reputation, though the National Media does play it up a LOT, but you can read about equally abhorrent behavior in NY, Boston, Chicago, L.A., Denver, etc.