Variations of this have been tried and studied for decades if not more, and if there is one thing blindingly, unequivocally clear, it's that this does not work

Variations of this have been tried and studied for decades if not more, and if there is one thing blindingly, unequivocally clear, it's that this does not work to reduce crime. (the debate could be about whether that's the (only) goal, my point is that for crime reduction it does not work)