I would suggest that's not the point, old man. The point is that the limits exist, and people have to trust that the rules are being followed because they can't

I would suggest that's not the point, old man. The point is that the limits exist, and people have to trust that the rules are being followed because they can't go around testing every drop of water that comes out of their tap, yet the rules are being broken invisibly. If the limits are wrong, sure, lets get them changed. Breaking the law because it's probably harmless doesn't make it acceptable.