When I worked in the tower at a local track, our tech guy would occaisionally tell the computer operator to change a racer's dial-in to 6.40. I would say why, he would say the racer isn't wearing his gloves, or neck collar, or pants.

Half the time the racer would stage without looking at the dial-in board, the other half would not stage thinking the tower put it in wrong. Then the starter would point out the violation.

I always got a kick out of that, it seemed like a better way to get the message across than DQing them.