Delay of Game

[Smoke]

I have seen this situation on high school and college level both. Clock is running,2:00 remaing Team O(Team D has no times out) has the ball and is called for delay of game. The penalty is marked off, then then the referee wides the clock and the game clock starts again. What would keep Team O who has the ball at mid field, from just letting the time run out., they would never has to run another play, just keep getting delay of game penalties.