Yeah, a process that takes two years. The government actually does investigate these things, and while it does happen, it doesn't happen very often. Plus, it is illegal, and while that may not stop people, it will at least deter some or slow them down. And there's nothing from stopping you from getting a marriage of convenience to somebody in a European country. Except the law and if you're married now, that is. But then, wouldn't that stop "the foreigners", or do they have some view of morality that is much more nebulous than yours?