The moment you start hunting them, piracy begins in increasing numbers.
fixed.
...It would probably help to use an example.
Like Spore. If I recall correctly, it had about a 1 to 1 ratio of people who purchased it to people who pirated it. Many people pirated because of the invasive DRM that it had which was removed in pirated copies. Hell, you could play the game early if you pirated it!
DRM (ineffective counter-measure) != Law Enforcement (Cops knocking on your door)
But the devil is in the details, isn't it? The difficulty in making and enforcing that is very difficult, and may cross with other laws concerning piracy. That's why it is not implemented for home users anywhere.
In Hong Kong it is illegal to use pirated software in companies - jail time for both the employee and employer. I don't see this law being enforced anywhere yet.
That's a terrible law that would put a lot of innocent people in jail. Think about it. Your employer tells you to use some software. How do you know if its pirated? And even if you do, if you refuse and your employer is arrested of fires you you now have no job. How could you consider thinking that that law should be applied anywhere!?
That's why I said the devil is in the details. And exactly why I have not yet seen the law being enforced.
If the government does not make that law, other countries and corporations will accuse her for not protecting their digital rights and complain to WTO.
http://www.google.com/search?q=WTO+piracy&ie=UTF-8.
That's why the laws are written, but rarely actively enforced.
Most bigger companies do have higher moral standards than others though, and with the laws in place, they perform routine check of all computers to remove pirated/license expired software.