Too many "may"'s and "could well"'s in that view, probably wouldn't stand up in a court of law. He could equally have had a bag of sweets that he wanted to throw into the crowd. That's why we don't arrest people before a crime has been committed. Is it a legal offence to enter the competitors only area? In the UK it is a criminal offence to invade a football pitch for example, not sure what the Polish law states. I suppose you could say the physical assault "victim" was guilty of trespass but we're getting into the realms of Polish law which I'm assuming neither of us really know much about.