There are a lot of old, crufty, unloved laws still left on the books because removing them would be political suicide, or would take lots of work. But they are no longer respected, and any attempt to bring them to trial would be an utter waste of taxpayers' money. Taxi cabs without a bale of hay and a nosebag? For shame! Lock 'em up! A guy making himself feel confused? For shame! Lock 'em up! Someone tried to kill themselves? For shame! Lock 'em up! Someone downloaded porn over the net? For shame! Lock 'em up! And so on. Laws stop being used and respected long before they are struck off the books. They only get struck off when they get applied with patent and public injustice and there's a public outcry. Far more often, they just moulder, ignored and unloved.