Not appropriate, IMO.
On some level, it's like dinner being ruined while eating out because the food is palatable but *everything* else is awful...the dinner is ruined even if the food is edible. Eating out, for me, isn't about the food. I could have made the meal much MUCh cheaper at home (possibly even better, if it's something simple
)--I'm paying for the ability to eat in a restaurant, be waited on, etc. Making it up to me by giving me more food just doesn't cut it.
These fans had paid for their tickets (possibly more than the face value of the ticket) AND paid to attend the game (in some cases, the cost to fly out/accommodations/etc would be many times the face value of the ticket), 'spent' their time off work, and were paying for the experience of watching the game in the stadium with the fans, live.
I'm failing to see why they could not have found a way to 'announce' ahead of time that certain seats wouldn't be usable--at least letting people find out about the situation before they got in the door.