I'd prefer it done in public so everyone can watch
Pay per view. And make it tax deductible. Getting rid of scum is a form of charity. In fact, our boys and girls overseas are the most charitable people in the world. In addition to the gifts they give the kids and restoring/creating infrastructure for the locals, they give the greatest present of all: freedom.
Plus they also send the scum to hell and keep them from hurting any more people.
Make watching it a requirement for all high school and college sports teams.