If you were in a movie theater that was mostly empty, and someone came and sat down right next to you, what would you do?

I was in a movie theater today (seeing Eat, Pray, Love) and the theater was fairly empty. Each row had either one or two couples in the whole row, and a lot of rows were totally empty. In the next row from me, but farther down, sat a middle aged couple. There was nobody in the whole rest of the row. Two women came in and slid over and sat right next to the couple.

I was thinking if it were me, i would probably have gotten up and moved. Yes, the couple were there first, but i would find having someone right next to me while most of the theater is empty to be annoying, so i would rather get up and change seats. I don’t feel it would be appropriate to say something to them, as they technically have the right to sit wherever they want.

I am wondering if my feelings are in the minority. What would you do if you were in a fairly empty theater and someone came and sat right next to you?