@John ********
Everyone that does not comply with the rules indeed should be weeded out because they do not belong to the target group (anymore), but it is an illusion that will work without extra checks at entrance of the country, and those checks are not practically at the border. And since they made the visa multi entry, it will be difficult weeding out those.
Even look here how many openly tell they don't comply with the requirements anymore and still use the visa.