That amounts to punishment by aggravated assault.

And an implied endorsement of vigilante justice without trial.

I don't care who does what to you or your fucking children -- let it be proven in a court of law and then let the law take care of it.

If the guy was a real molester, he should have suffered the legal consequences. The father, however, did more than cause someone emotional distress, and his consequences should have been far more severe.