I guess I don't see a reason why a whole table full of people should have to move because one woman decided to sit at a table that was obviously saved. And I didn't want to move because DS had specifically asked his kids to save the table they did, as they had saved it for us many other times (with no problems) and being this is DS's DD's last concert since she is a senior and will be graduating in two weeks. DS barely had time to drive home from work, take a shower and get to the concert.
If I had been the woman, I never would have sat at a saved table, or even if I did and then the people came I would at least ask, politely (not crabby like she did) if they were going to need the entire table. If they weren't sure, I still would have moved. Oh well, like I said in the end it worked out okay but I was just curious to see other opinions on what they would do in this same situation.