Because some girls were throwing flour outside his pub, then he told then to stop and took the flour off them so they wouldn't make any more of a mess. He didn't hurt them, but took the flour away so he could at least try clean up before having a late friday night running the pub.
I'm sorry, but this is loving rediculous. This is just plain abuse of rights. I'm just going to throw some eggs at their house now, and when they take the eggs off me for throwing them, I'm going to charge them for assault. Same principal.