It doesn't need to be 100%. It just needs to be a reasonable attempt. We all too often let perfect be the enemy of good. Impossible to enforce? That's not true.

It doesn't need to be 100%. It just needs to be a reasonable attempt. We all too often let perfect be the enemy of good. Impossible to enforce? That's not true. They did so right here. Yes, people will work around it, and some will slip through the cracks. That doesn't mean it's a useless policy with no impact.