The initial question was would you let him run for homecoming queen. This implies that despite your pre-interventions and perfect parenting, he has inexplicably decided to act against you wishes.
You answered no, you would not let him run.

The second question is given that he has already chosen to defy you, how would you stop him from running for queen? Would you disown him? Beat him? Kick him out of the house? Shame him?

The way you answered reminds me of parents who say my kids would never do drugs. I raised them right.