Microsoft has taken a good approach to fight against piracy, Recently Turn by Turn GPS Navigation got cracked. And the unusual part is that some-one uploaded the unaltered XAP to Marketplace and it was accepted; Microsoft’s fault
Italian site Plaffo pointed it out, and as normally € 35.99 app was being made available for free thousands of people downloaded it.
Microsoft when notified immediately removed the app from Marketplace, but more interestingly also activated automatic uninstall of the app, a measure that would normally be reserved for malicious apps.
TheOwner, under who’s account the app was uploaded (and who claims that his PC was hacked) has been threatened with $40,000 of damages, which gives an idea of the losses involved.