Offense is out there to score points and eat up the clock.
You can do plenty of things when you are ahead:
1) Go Vanilla -- and if they still can't stop you, who can really complain. This doesn't mean you run until you have to punt the ball. The goal is to A) keep moving the chains to eat up clock. Eventually, the field is only 100 yards long and the result of moving the chains can be a score
2) Dial up some other schemes. Call it live game padded practice. This allows the team to work on things during the game and makes defenders have to cover more options on what your offense might do.
3) Opposing team offenses tend to get more pass oriented. This means the defense has the tactical advantage and may result in the other team having to punt the ball. Unless you are the Pats, in which case, we let you run the length of the field as long as it eats up clock time .
4) If you don't like it, stop them or as a fan, turn off the tv