Maybe they went a bit far but he definately deserved something. Im sick of old people walking round doing what the f*ck they want and getting away with it. The amount of times they've barged into me or my friends and not even said sorry is ridiculous. Maybe they should of just thrown a drink on him instead (although that would be wasteful) but either way he needed teaching a lesson and I have no sympathy for him.
Kicking him went a bit too far, though only because he was that old.