During a war that I had with a neighboring nation, I got an event that said that my wonder was raided and needs repair. In general, it is a good event, but it doesn't fit at all in the situation that I experienced. In that war, no enemy attacked any of my cities and the city in question with that wonder and its territories were far away from the battle sites and any enemy units. Furthermore, the enemy has not attacked any other of my cities and could be easily defeated by me. Thus I think in that scenario this event doesn't fit at all. I think as criteria for the event, the enemy would need to at least have been attacking the city with the wonder or even walked over it.