During The Hunger Games I actually did this. There was a group of 4 fifty-something adults who were talking at normal speaking volume. This was in the reserved “Prive” section of what was (at the time) the nicest theater in town. They were one row back, 20 feet away but were so loud they may as well have been right…

You have a really great setup but I would strongly consider getting a projector in place of that flat screen. It totally changed the way I watch movies at home.

The winner: